sceAtrac: set full filled buffer when game ask to do so via sceAtracGetRemainFrame()
Dostate for resetBuffer
Add Vertex texture/color GE commands
Check for no audio more directly.

This fixes some cases where the flag was set wrong.
Trigger memchecks on writing out video data.
Trigger memchecks on audio decode from video.
Workaround scePauth_F7AA47F6()
Move POWER_VMEM_IN_USE to sceKernel.h
Stub SysMemUserForUser_ACBD88CA/945E45DA
Invalidate when writing video image.

It is required to update the framebuffer, of course.  Fixes Dead or Alive
video flicker.
Allow smaller psmfplayer buffer sizes.

Some libpsmfplayer.prx libraries allow smaller.
Don't return video/audio the first couple frames.

Fixes issues where games don't expect audio to be written to the display
buffer for the first couple games.  Reported to fix #5416.
Let desktop SDL builds see the fullscreen option, too. There's no reason they can't.
Fix deadlock in multithreading.

Fixes #5971.
Fix space issues