drm/kms: Remove incorrect comment in struct drm_mode_modeinfo

Signed-off-by: Dave Airlie <airlied@redhat.com>

include/drm/drm_mode.h

@@ -85,7 +85,7 @@ struct drm_mode_modeinfo {
 	__u16 hdisplay, hsync_start, hsync_end, htotal, hskew;
 	__u16 vdisplay, vsync_start, vsync_end, vtotal, vscan;
 
-	__u32 vrefresh; /* vertical refresh * 1000 */
+	__u32 vrefresh;
 
 	__u32 flags;
 	__u32 type;