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 <christophe.jaillet@wanadoo.fr>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
1 file changed