[PATCH] usb gadget: fix compile errors

This patch fixes compile errors when pxa2xx_udc is to be compiled
for ixp4xx platform.

Signed-off-by: Milan Svoboda <msvoboda@ra.rockwell.com>
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>