USB: r8a66597-udc: return -ENOMEM if kzalloc() fails

Signed-off-by: Axel Lin <axel.lin@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/usb/gadget/r8a66597-udc.c

@@ -1557,6 +1557,7 @@ static int __init r8a66597_probe(struct platform_device *pdev)
 	/* initialize ucd */
 	r8a66597 = kzalloc(sizeof(struct r8a66597), GFP_KERNEL);
 	if (r8a66597 == NULL) {
+		ret = -ENOMEM;
 		printk(KERN_ERR "kzalloc error\n");
 		goto clean_up;
 	}