drm/radeon: minor updates to cik.c for hawaii

Skip programming a register that was removed and
adjust the mask of the VM client status.

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

diff --cc drivers/gpu/drm/radeon/cik.c
Simple merge

diff --cc drivers/gpu/drm/radeon/cikd.h
Simple merge