drm/radeon/kms/DCE4.1: fix dig encoder to transmitter mapping

llano has fully routeable dig encoders similar to DCE3.2 while
ontario has a hardcoded mapping similar to DCE4.0.
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>

drivers/gpu/drm/radeon/radeon_encoders.c

@@ -1756,10 +1756,15 @@ static int radeon_atom_pick_dig_encoder(struct drm_encoder *encoder)
 	if (ASIC_IS_DCE4(rdev)) {
 		dig = radeon_encoder->enc_priv;
 		if (ASIC_IS_DCE41(rdev)) {
+			/* ontario follows DCE4 */
+			if (rdev->family == CHIP_PALM) {
 				if (dig->linkb)
 					return 1;
 				else
 					return 0;
+			} else
+				/* llano follows DCE3.2 */
+				return radeon_crtc->crtc_id;
 		} else {
 			switch (radeon_encoder->encoder_id) {
 			case ENCODER_OBJECT_ID_INTERNAL_UNIPHY: