drm fixes for 5.13-rc6

drm:
- auth locking fix

ttm:
- locking fix

amdgpu:
- Use kvzmalloc in amdgu_bo_create
- Use drm_dbg_kms for reporting failure to get a GEM FB
- Fix some register offsets for Sienna Cichlid
- Fix fall-through warning

radeon:
- memcpy_to/from_io fixes

msm:
- NULL ptr deref fix
- CP_PROTECT reg programming fix
- incorrect register shift fix
- DSI blank screen fix

sun4i:
- hdmi output probing fix

mcde:
- DSI pipeline calc fix

vc4:
- out of bounds fix
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