drm/amdgpu: access register without KIQ

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

Signed-off-by: Emily Deng <Emily.Deng@amd.com>
Acked-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>