OMAP: DSS2: fix driver probe error handling

If driver's probe failed, the uninit was not called.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@nokia.com>
diff --git a/drivers/video/omap2/dss/core.c b/drivers/video/omap2/dss/core.c
index 967cbda..39b1a20 100644
--- a/drivers/video/omap2/dss/core.c
+++ b/drivers/video/omap2/dss/core.c
@@ -778,6 +778,7 @@
 
 	if (r) {
 		DSSERR("driver probe failed: %d\n", r);
+		dss_uninit_device(core.pdev, dssdev);
 		return r;
 	}