drm/amdgpu: add get_clockgating callback for soc15 (v3)

v2: squash register typo fix from Ray
v3: fix spelling

Signed-off-by: Huang Rui <ray.huang@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Edward O'Callaghan <funfunctor@folklore1984.net>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2 files changed