[ARM] pxa/vpac270: UDC and UHC support

NOTE:
I wasn't able to get it running without reseting the HXOE (so it's there based
on my tests with the hardware). I'll have to investigate it properly when I have
more time.

Signed-off-by: Marek Vasut <marek.vasut@gmail.com>
Reviewed-by: Robert Jarzmik <robert.jarzmik@free.fr>
Signed-off-by: Eric Miao <eric.y.miao@gmail.com>