drm/kms: Init the CRTC info fields for modes forced from the command line.

Fixes fdo bug 24710.
Signed-off-by: Francisco Jerez <currojerez@riseup.net>
Signed-off-by: Dave Airlie <airlied@redhat.com>

drivers/gpu/drm/drm_crtc_helper.c

@@ -331,6 +331,7 @@ static struct drm_display_mode *drm_pick_cmdline_mode(struct drm_connector *conn
 			    cmdline_mode->refresh_specified ? cmdline_mode->refresh : 60,
 			    cmdline_mode->rb, cmdline_mode->interlace,
 			    cmdline_mode->margins);
+	drm_mode_set_crtcinfo(mode, CRTC_INTERLACE_HALVE_V);
 	list_add(&mode->head, &connector->modes);
 	return mode;
 }