drm fixes for 5.18-rc3

i915:
- Correct legacy mmap disabling to use GRAPHICS_VER_FULL

msm:
- system suspend fix
- kzalloc return checks
- misc display fix
- iommu_present removal

amdgpu:
- Fix for alpha properly in pre-multiplied mode
- Fix VCN 3.1.2 firmware name
- Suspend/resume fix
- Add a gfxoff quirk for Mac vega20 board
- DCN 3.1.6 spread spectrum fix
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