[PATCH] usb gadget: allow drivers support speeds higher than full speed

This patch removes limitation which prevents use of drivers that support
speeds different that full speed.

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>