Same as navi10.

v2: squash in logic fix (Colin Ian King)
v3: squash in logic simplification (Alex)
Signed-off-by: NXiaojie Yuan <xiaojie.yuan@amd.com>
Reviewed-by: NSnow Zhang <Snow.Zhang@amd.com>
Signed-off-by: NAlex Deucher <alexander.deucher@amd.com>