drm fixes for 5.16-rc2

scheduler:
- two refcounting fixes

cma-helper:
- use correct free path for noncoherent

efifb:
- probing fix

amdgpu:
- Better debugging info for SMU msgs
- Better error reporting when adding IP blocks
- Fix UVD powergating regression on CZ
- Clock reporting fix for navi1x
- OLED panel backlight fix
- Fix scaling on VGA/DVI for non-DC display code
- Fix GLFCLK handling for RGP on some APUs
- fix potential memory leak

amdkfd:
- GPU reset fix

i915:
- return error handling fix
- ADL-P display fix
- TGL DSI display clocks fix

nouveau:
- infoframe corruption fix

sun4i:
- Kconfig fix
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