CD Cache: Fixed seeking time simulation

- Fixes regression with "Felix the Cat"

AD7528: Fix of signed integer math

Fixes base case audio mixing

Moved Quartus block ram synthesis

I think it might be cleaner this way
Also removal of unused file

FMV: Improved frame pacing

- 25 fps hard coded for experiments
- Presentation time utilized to define start of playback
  - Makes use of FIFO structure for stable frame rate
- Firmware
  - Provides all 3 planar framebuffers to hardware for playback

FMV: Improved P and B frames

- Added detection of MPEG stream overflows (for debugging)
- Reduced PLL for worker to 80 MHz (was 90 MHz before)
- Decoder core now running at worker speed (80 MHz instead of 30 MHz)
- MPEG Firmware
  - Readded better FIFO level checks to avoid underflows
  - Better buffer management to ensure immutability of decoded frames
- Frameplayer now switches framebuffer address when frame was decoded
- Added MPEG optimized data cache for DDR3 access to store 8 macroblock lines

Shows Dragon's Lair intro with less artefacts now.
Timing is not correct as the presentation time is not utilized

Cleanup of project

Putting modules in separate files

Audiodecoder now processes elementary data instead of muxed

Saves lots of memory
Fixes support for very short MPEG files
pl_mpeg seems to be not able to demux short streams

Lucky Luke seems fine now

Added VMPEG Vsync interrupt

Fixes bootup of Lucky Luke
No audio in game afterwards

MPEG Audio is working

Timing is still wrong
SkyWays music can be heard

Release 20250614

- First release on mister-devel
- Fix corrupted ROM content when VMPEG ROM is present
    - An existing boot2.rom has overwritten the base machine ROM before.
    - This fix places the VMPEG ROM at a separate and later unused location
      allowing to have a second CD-i core around which could make use of it
      without affecting the stable release.