drm/amdgpu: access register without KIQ

there is no need to access register such as mmSMC_IND_INDEX_11
and mmSMC_IND_DATA_11 through KIQ because they are VF-copy.

Signed-off-by: Yintian Tao <yttao@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>