drm fixes for 5.16-rc6

i915:
- Fix a bound check in the DMC fw load.

ast:
- NULL ptr deref fix

simpledrm:
- pixel clock units fix

fb-helper:
- userspace regression revert

amdgpu:
- Fix RLC register offset
- GMC fix
- Properly cache SMU FW version on Yellow Carp
- Fix missing callback on DCN3.1
- Reset DMCUB before HW init
- Fix for GMC powergating on PCO
- Fix a possible memory leak in GPU metrics table handling on RN
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