mtd: onenand: return proper error if regulator_get fails

Signed-off-by: Axel Lin <axel.lin@gmail.com>
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
diff --git a/drivers/mtd/onenand/omap2.c b/drivers/mtd/onenand/omap2.c
index a916dec..0d9073d 100644
--- a/drivers/mtd/onenand/omap2.c
+++ b/drivers/mtd/onenand/omap2.c
@@ -741,6 +741,7 @@
 		c->regulator = regulator_get(&pdev->dev, "vonenand");
 		if (IS_ERR(c->regulator)) {
 			dev_err(&pdev->dev,  "Failed to get regulator\n");
+			r = PTR_ERR(c->regulator);
 			goto err_release_dma;
 		}
 		c->onenand.enable = omap2_onenand_enable;