drm/radeon/kms: add new radeon_info ioctl query for clock crystal freq

Needed for timer queries in the 3D driver.

Signed-off-by: Alex Deucher <alexdeucher@gmail.com>
Signed-off-by: Dave Airlie <airlied@gmail.com>
diff --git a/include/drm/radeon_drm.h b/include/drm/radeon_drm.h
index e95a86b..e5c607a 100644
--- a/include/drm/radeon_drm.h
+++ b/include/drm/radeon_drm.h
@@ -907,6 +907,7 @@
 #define RADEON_INFO_TILING_CONFIG	0x06
 #define RADEON_INFO_WANT_HYPERZ		0x07
 #define RADEON_INFO_WANT_CMASK		0x08 /* get access to CMASK on r300 */
+#define RADEON_INFO_CLOCK_CRYSTAL_FREQ	0x09 /* clock crystal frequency */
 
 struct drm_radeon_info {
 	uint32_t		request;