178: Update temperature and humidity to use 2.0 API r=phil-levis a=phil-levis

In porting over the capsules, somehow the libtock-c parts were missed for temperature and humidity. This updates them to the 2.0 syscall API. Part of #177 

Co-authored-by: Philip Levis <[email protected]>

177: Tock 2.0 switchover r=hudson-ayers a=phil-levis

This PR 
1. removes the Tock 1.0 system calls from tock.c,
2. changes `subscribe_cb` to `subscribe_upcall`
3. updates `driver_exists` to use `command2`

It **does not** yet change the names (e.g., `command2` to `command`). This because many userspace libraries have not been ported to the new system calls:

- [x] tsl2561 @ppannuto #182
- [x] temperature @phil-levis #178 
- [x] ~aes~ 
- [x] ~st7735~ #185 
- [x] pca9544a @alevy 
- [x] lsm303dlhc #191 @alexandruradovici 
- [x] usb @alistair23 #189 
- [x] ~console~ (minor, fixed in this PR) @phil-levis #177 
- [x] proximity @alevy  #181
- [x] ltc294x @alevy #180 
- [x] ~tmp006~ #184 
- [x] l3gd20 #192 @alexandruradovici 
- [x] lps35hb #187 
- [x] humidity @phil-levis #178 
- [x] max17205 #183 
- [x] ipc @alevy #176, #177

This causes an undefined symbol when compiling, so libtock-c is not usable/linkable. But it does compile. As these are fixed, tested, and pushed to `tock-2.0-dev`, I will keep this branch up to date and unblock it when it is ready.

Co-authored-by: Philip Levis <[email protected]>
Co-authored-by: Hudson Ayers <[email protected]>

2446: Tock 2.0 Alpha1 r=alevy a=bradjc

### Pull Request Overview

This pull request updates the Tock kernel to the 2.0 kernel<->userspace interface.

The current plan is to merge this on Monday, March 22, once @lschuermann has cleaned up the commit log.

**This is an API breaking change!**

Merging this PR will break the Tock 1.0 agreement with userspace. When this PR is merged, Tock is in "release mode" towards 2.0. The major version number change signifies the breaking change for userspace. We expect that merging this PR will create ~~v2.0-rc1~~ v2.0-alpha1, and further development towards v2.0 will occur on the master branch until the release.

However, merging this PR only signifies breaking the 1.0 API, it does not imply the 2.0 interface is stabilized. We expect more development before settling on the final 2.0 API.

Here are the three major items that we have to do before merging the `tock-2.0-dev` branch into master: 
1. [x] Completely wrap up the system call API/ABI updates (I think this is all that's left: tock/libtock-c#177; we might need a follow-up one for TOCK_EBADRVAL, but this is not blocking)
2. [x] Update documentation, so it is consistent with the code: Markdown files (Syscalls.md, Userland.md)
3. [x] Update documentation, so it is consistent with the code: the Tock book tock/book#13
4. [x] Update documentation, so it is consistent with the code: courses #2455 
5. [x] Overall code review (this PR)
6. [x] Change Callback to Upcall #2454 
7. [x] Change GenericSyscallReturnValue to SyscallReturn
8. [x] Clean up commit log (@lschuermann )
9. [x] libtock-c testing (@phil-levis ), tock/libtock-c#195

Then, before we can tag an RC1, we need to complete everything in #2429.

### Merge Sign-Off

This is a big change, and API breaking. It would be good to get consensus. Can you please check your name when you are ready for this PR to be merged? Doing it this way 1) allows me to participate and 2) doesn't change as new commits are added.

- ~[ ] Niklas Adolfsson, @niklasad1~ (#2495)
- [x] Hudson Ayers, @hudson-ayers
- [x] Brad Campbell, @bradjc
- [x] Branden Ghena, @brghena
- [x] Philip Levis, @phil-levis
- [x] Amit Levy, @alevy
- [x] Pat Pannuto, @ppannuto 
- [x] Johnathan Van Why, @jrvanwhy


### Testing Strategy

This PR was tested incrementally as features were added and changes were made. It was also tested at the end with libtock-c using the imix test application (which does many different system calls and system call patterns) as well as MPU test applications.


### TODO or Help Wanted

For this PR, nothing. Before release, #2429 


### Documentation Updated

- [x] Updated the relevant files in `/docs`, or no updates are required.

### Formatting

- [x] Ran `make prepush`.


Co-authored-by: bors[bot] <26634292+bors[bot]@users.noreply.github.com>
Co-authored-by: Leon Schuermann <[email protected]>
Co-authored-by: Alexandru Radovici <[email protected]>
Co-authored-by: Philip Levis <[email protected]>
Co-authored-by: Hudson Ayers <[email protected]>

178: Update temperature and humidity to use 2.0 API r=phil-levis a=phil-levis

In porting over the capsules, somehow the libtock-c parts were missed for temperature and humidity. This updates them to the 2.0 syscall API. Part of tock#177 

Co-authored-by: Philip Levis <[email protected]>

177: Tock 2.0 switchover r=hudson-ayers a=phil-levis

This PR 
1. removes the Tock 1.0 system calls from tock.c,
2. changes `subscribe_cb` to `subscribe_upcall`
3. updates `driver_exists` to use `command2`

It **does not** yet change the names (e.g., `command2` to `command`). This because many userspace libraries have not been ported to the new system calls:

- [x] tsl2561 @ppannuto tock#182
- [x] temperature @phil-levis tock#178 
- [x] ~aes~ 
- [x] ~st7735~ tock#185 
- [x] pca9544a @alevy 
- [x] lsm303dlhc tock#191 @alexandruradovici 
- [x] usb @alistair23 tock#189 
- [x] ~console~ (minor, fixed in this PR) @phil-levis tock#177 
- [x] proximity @alevy  tock#181
- [x] ltc294x @alevy tock#180 
- [x] ~tmp006~ tock#184 
- [x] l3gd20 tock#192 @alexandruradovici 
- [x] lps35hb tock#187 
- [x] humidity @phil-levis tock#178 
- [x] max17205 tock#183 
- [x] ipc @alevy tock#176, tock#177

This causes an undefined symbol when compiling, so libtock-c is not usable/linkable. But it does compile. As these are fixed, tested, and pushed to `tock-2.0-dev`, I will keep this branch up to date and unblock it when it is ready.

Co-authored-by: Philip Levis <[email protected]>
Co-authored-by: Hudson Ayers <[email protected]>