ZMK doesn't use this. Disable this to prevent unexpected USB disconnection. The disconnection is observed under 3 circumstances on a Linux host:

1. Keyboard just performed a firmware upgrade and USB is kept connected.
2. Keyboard is woken from USB power source and USB is kept connected.
3. Keyboard is connected when host is booting, and when Linux is just initialized. The keyboard is working in BIOS but not in the OS.

When keyboard is "disconnected", a re-plug is required to make USB work again. Disabling SOF processing eliminates this re-plug.

Test on Makerdiary M60 shows this change will not affect boot protocol switching.

PR check-list

• Branch has a clean commit history
• Additional tests are included, if changing behaviors/core code that is testable.
• Proper Copyright + License headers added to applicable files (Generally, we stick to "The ZMK Contributors" for copyrights to help avoid churn when files get edited)
• Pre-commit used to check formatting of files, commit messages, etc.
• Includes any necessary documentation changes.