[PATCH] USB: Fix for ati_remote

when stealing code from ati_remote for a GPL-driver of my usbradio (because of
its neat usb int transfers) I found out, that the inbuf is freed twice.

I don't have the ati-remote, so I don't know it is a problem at all, but it
looks strange to me anyway. Also I don't know if it has been fixed already in
newer kernel versions.

From: Patrick Boettcher <patrick.boettcher@desy.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>