ARM: shmobile: lager: Add USBHS support

This adds USBHS PHY and registers USBHS device if the driver is enabled.

Signed-off-by: Valentine Barshak <valentine.barshak@cogentembedded.com>
Acked-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>