usb: chipidea: usb2: check memory allocation failure

Check memory allocation failure and return -ENOMEM in such a case, as
already done few lines below for another memory allocation.

Signed-off-by: Christophe JAILLET <[e-mail]>
Signed-off-by: Greg Kroah-Hartman <[e-mail]>

drivers/usb/chipidea/ci_hdrc_usb2.c

···
 
 	if (!ci_pdata) {
 		ci_pdata = devm_kmalloc(dev, sizeof(*ci_pdata), GFP_KERNEL);
+		if (!ci_pdata)
+			return -ENOMEM;
 		*ci_pdata = ci_default_pdata;	/* struct copy */
 	}