drm/amdgpu: add soc21 support for GC 11.0.2

Add initial soc21 support.
Reviewed-by: Hawking Zhang <Hawking.Zhang@amd.com>
Signed-off-by: Flora Cui <flora.cui@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/amdgpu/soc21.c

@@ -547,6 +547,11 @@ static int soc21_common_early_init(void *handle)
 			AMD_PG_SUPPORT_MMHUB;
 		adev->external_rev_id = adev->rev_id + 0x1; // TODO: need update
 		break;
+	case IP_VERSION(11, 0, 2):
+		adev->cg_flags = 0;
+		adev->pg_flags = 0;
+		adev->external_rev_id = adev->rev_id + 0x10;
+		break;
 	default:
 		/* FIXME: not supported yet */
 		return -EINVAL;