USB: pxa2xx_udc recognizes ixp425 rev b0 chip

Make the pxa2xx_udc driver recognize a newer revision of the IXP425 chip.

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>