drm: Remove explicit vrefresh initialization from DRM_MODE()

No need to zero initialize .vrefresh in DRM_MODE() since it's using
desgignated initializers.

This will also avoid some duplicate initialization warnings later.
Reviewed-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>

include/drm/drm_crtc.h

@@ -120,7 +120,7 @@ enum drm_mode_status {
 	.hdisplay = (hd), .hsync_start = (hss), .hsync_end = (hse), \
 	.htotal = (ht), .hskew = (hsk), .vdisplay = (vd), \
 	.vsync_start = (vss), .vsync_end = (vse), .vtotal = (vt), \
-	.vscan = (vs), .flags = (f), .vrefresh = 0, \
+	.vscan = (vs), .flags = (f), \
 	.base.type = DRM_MODE_OBJECT_MODE
 
 #define CRTC_INTERLACE_HALVE_V 0x1 /* halve V values for interlacing */