Modify GC register access from MMIO to RLCG if the indirect
flag is set
Signed-off-by: NVictor Skvortsov <victor.skvortsov@amd.com>
Reviewed-by: NDavid Nieto <david.nieto@amd.com>
Signed-off-by: NAlex Deucher <alexander.deucher@amd.com>