drm fixes for 5.6-rc2

core:
- edid build fix

mst:
- fix NULL ptr deref

vgem:
- fix close after free

msm:
- better dma-api usage

sun4i:
- disable allow_fb_modifiers

amdgpu:
- Additional OD fixes for navi
- Misc display fixes
- VCN 2.5 DPG fix
- Prevent build errors on PowerPC on some configs
- GDS EDC fix

i915:
- dsi/acpi fixes
- gvt locking and allocation fixes
- gem/gt fixes
- bios timing parameters fix
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