headers: sync up amdgpu_drm.h with drm-next

Add sensor_info type
AMDGPU_INFO_SENSOR_STABLE_PSTATE_GFX_MCLK
AMDGPU_INFO_SENSOR_STABLE_PSTATE_GFX_SCLK

Reviewed-by: Evan Quan <evan.quan@amd.com>
Signed-off-by: Rex Zhu <Rex.Zhu@amd.com>