drm/radeon/kms: set SX_MISC in the r6xx blit code (v2)

commit cf00790d upstream.

Mesa may set it to 1, causing all primitives to be killed.

v2: also update the r7xx code
Signed-off-by: Marek Olšák <maraeo@gmail.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/gpu/drm/radeon/r600_blit_shaders.c

@@ -313,6 +313,10 @@ const u32 r6xx_default_state[] =
 	0x00000000, /* VGT_REUSE_OFF */
 	0x00000000, /* VGT_VTX_CNT_EN */
 
+	0xc0016900,
+	0x000000d4,
+	0x00000000, /* SX_MISC */
+
 	0xc0016900,
 	0x000002c8,
 	0x00000000, /* VGT_STRMOUT_BUFFER_EN */
@@ -625,6 +629,10 @@ const u32 r7xx_default_state[] =
 	0x00000000, /* VGT_REUSE_OFF */
 	0x00000000, /* VGT_VTX_CNT_EN */
 
+	0xc0016900,
+	0x000000d4,
+	0x00000000, /* SX_MISC */
+
 	0xc0016900,
 	0x000002c8,
 	0x00000000, /* VGT_STRMOUT_BUFFER_EN */