drm/radeon: add support for STRMOUT_BASE_UPDATE on 7xx

Required for streamout.  Bump drm minor.

Marek v2: fix pkt->count check

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Michel Dänzer <michel.daenzer@amd.com>
Signed-off-by: Marek Olšák <maraeo@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
diff --git a/drivers/gpu/drm/radeon/r600d.h b/drivers/gpu/drm/radeon/r600d.h
index c6857e8..025fd5b 100644
--- a/drivers/gpu/drm/radeon/r600d.h
+++ b/drivers/gpu/drm/radeon/r600d.h
@@ -1164,6 +1164,7 @@
 #define	PACKET3_SET_CTL_CONST				0x6F
 #define		PACKET3_SET_CTL_CONST_OFFSET			0x0003cff0
 #define		PACKET3_SET_CTL_CONST_END			0x0003e200
+#define	PACKET3_STRMOUT_BASE_UPDATE			0x72 /* r7xx */
 #define	PACKET3_SURFACE_BASE_UPDATE			0x73