drm/radeon/kms/r6xx+: add query for tile config (v2)

Userspace needs this information to access tiled
buffers via the CPU.

v2: rebased on evergreen accel changes

Signed-off-by: Alex Deucher <alexdeucher@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
diff --git a/include/drm/radeon_drm.h b/include/drm/radeon_drm.h
index 5347063..ac5f040 100644
--- a/include/drm/radeon_drm.h
+++ b/include/drm/radeon_drm.h
@@ -904,6 +904,7 @@
 #define RADEON_INFO_ACCEL_WORKING	0x03
 #define RADEON_INFO_CRTC_FROM_ID	0x04
 #define RADEON_INFO_ACCEL_WORKING2	0x05
+#define RADEON_INFO_TILING_CONFIG	0x06
 
 struct drm_radeon_info {
 	uint32_t		request;