staging: emxx_udc: I/O memory and IRQ resource support

Adjust the emxx_udc driver to make use of the standard
driver model to pass I/O memory and IRQ as resources
instead of hard coding those things in the driver.

Needs more work - the VBUS signal is yet not handled.

Signed-off-by: Magnus Damm <damm+renesas@opensource.se>
Acked-by: Simon Horman <horms+renesas@verge.net.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>