Initialize DMUB for DCN316. Use same funcs as DCN31 for
DCN316.
Reviewed-by: NHarry Wentland <harry.wentland@amd.com>
Acked-by: NPrike Liang <Prike.Liang@amd.com>
Signed-off-by: NLeo Li <sunpeng.li@amd.com>
Signed-off-by: NAlex Deucher <alexander.deucher@amd.com>