usb: chipidea: msm: Initialize offset of the capability registers

Since commit 62bb84e (usb: gadget: ci13xxx: convert to platform device)
start address of the capability registers is not passed correctly to
udc_probe(). Fix this.

Signed-off-by: Peter Chen <peter.chen@freescale.com>
Signed-off-by: Ivan T. Ivanov <iivanov@mm-sol.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>