Merge linux-drm-v5-6-rc3

Reduce diffs by side-loading some header files like Linux.

From riastradh

Eliminate -Wpointer-arith patches; use -Wno-pointer-arith instead.

Make amdgpu cik build.

- Sprinkle __UNCONST and __UNVOLATILE judiciously.
- Ifdef out debugfs stuff and other unused things.
- Add includes.
- Convert void * to char * before arithmetic.
- Add proto

Make amdgpu cik build.

- Sprinkle __UNCONST and __UNVOLATILE judiciously.
- Ifdef out debugfs stuff and other unused things.
- Add includes.
- Convert void * to char * before arithmetic.
- Add prototype for amdgpu_cik_gpu_check_soft_reset.
. XXX Should really be in a header file, but whatever...
- Mark unused variables.
- sprintf -> snprintf

show more ...

New option AMDGPU_CIK for devices covered by radeon and amdgpu.