drm fixes for 5.7-rc1

i915:
- gvt: Fix one clang warning on debug only function
       Use ARRAY_SIZE for coccicheck warn
- Use after free fix for display global state.
- Whitelisting context-local timestamp on Gen9
  and two scheduler fixes with deps (Cc: stable)
- Removal of write flag from sysfs files where
  ineffective

nouveau:
- HDMI/DP audio HDA fixes
- display hang fix for Volta/Turing
- GK20A regression fix.

amdgpu:
- Prevent hwmon accesses while GPU is in reset
- CTF interrupt fix
- Backlight fix for renoir
- Fix for display sync groups
- Display bandwidth validation workaround
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