drm/radeon: add connector table for Mac G4 Silver

Apple cards do not provide data tables in the vbios
so we have to hard code the connector parameters
in the driver.

Reported-by: Albrecht Dreß <albrecht.dress@arcor.de>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
diff --git a/drivers/gpu/drm/radeon/radeon_mode.h b/drivers/gpu/drm/radeon/radeon_mode.h
index d818b50..ed8a0fa 100644
--- a/drivers/gpu/drm/radeon/radeon_mode.h
+++ b/drivers/gpu/drm/radeon/radeon_mode.h
@@ -209,7 +209,8 @@
 	CT_RN50_POWER,
 	CT_MAC_X800,
 	CT_MAC_G5_9600,
-	CT_SAM440EP
+	CT_SAM440EP,
+	CT_MAC_G4_SILVER
 };
 
 enum radeon_dvo_chip {