mtd: nand: orion: Handle return value of clk_prepare_enable

clk_prepare_enable() can fail here and we must check its return value.

Signed-off-by: Arvind Yadav <[e-mail]>
Signed-off-by: Boris Brezillon <[e-mail]>

drivers/mtd/nand/orion_nand.c

···
 		}
 	}
 
-	clk_prepare_enable(info->clk);
+	ret = clk_prepare_enable(info->clk);
+	if (ret) {
+		dev_err(&pdev->dev, "failed to prepare clock!\n");
+		return ret;
+	}
 
 	ret = nand_scan(mtd, 1);
 	if (ret)