[ARM] 4174/1: H1940 usb device definitions

This patch is adding the usb device controller to the h1940 device
list. It's also adding the code to handle the usb pull-ups.

Signed-off-by: Arnaud Patard <arnaud.patard@rtp-net.org>
Acked-by: Ben Dooks <ben-linux@fluff.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>