drm/amdgpu: move struct amdgpu_mqd and helpers into header file

drm/amdgpu: move struct amdgpu_mqd and helpers into header file

Move struct amdgpu_mqd_prop, struct amdgpu_mqd, and helpers from the monolithic amdgpu.h
into existing amdgpu_mes.h file.

This is part of the ongoing effort to reduce the size of amdgpu.h into their own respective
separate headers.

Signed-off-by: Shahyan Soltani <shahyan.soltani@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>