video: udlfb: Make local symbol static

'dlfb_handle_damage' is used only in this file. Make it static.

Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
diff --git a/drivers/video/udlfb.c b/drivers/video/udlfb.c
index 20353a6..d2e5bc3 100644
--- a/drivers/video/udlfb.c
+++ b/drivers/video/udlfb.c
@@ -573,7 +573,7 @@
 	return 0;
 }
 
-int dlfb_handle_damage(struct dlfb_data *dev, int x, int y,
+static int dlfb_handle_damage(struct dlfb_data *dev, int x, int y,
 	       int width, int height, char *data)
 {
 	int i, ret;