OMAPFB: make debug message more useful

Make the debug message useful by printing the name of the device
that no associated driver could be found for.

Signed-off-by: Andy Doan <andy.doan@linaro.org>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
diff --git a/drivers/video/omap2/omapfb/omapfb-main.c b/drivers/video/omap2/omapfb/omapfb-main.c
index 602b71a..e5a64b3 100644
--- a/drivers/video/omap2/omapfb/omapfb-main.c
+++ b/drivers/video/omap2/omapfb/omapfb-main.c
@@ -2373,7 +2373,8 @@
 		omap_dss_get_device(dssdev);
 
 		if (!dssdev->driver) {
-			dev_err(&pdev->dev, "no driver for display\n");
+			dev_err(&pdev->dev, "no driver for display: %s\n",
+				dssdev->name);
 			r = -ENODEV;
 		}