drm: Ensure string is null terminated.

Fixes Coverity buffer not null terminated defect.
Signed-off-by: Vinson Lee <vlee@vmware.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>

drivers/gpu/drm/drm_crtc.c

@@ -2118,8 +2118,10 @@ struct drm_property *drm_property_create(struct drm_device *dev, int flags,
 	property->num_values = num_values;
 	INIT_LIST_HEAD(&property->enum_blob_list);
 
-	if (name)
+	if (name) {
 		strncpy(property->name, name, DRM_PROP_NAME_LEN);
+		property->name[DRM_PROP_NAME_LEN-1] = '\0';
+	}
 
 	list_add_tail(&property->head, &dev->mode_config.property_list);
 	return property;