usb: add support for ULPI/SERIAL/HSIC PHY modes

Import usb_phy_interface enum values and DT match strings from the Linux
kernel.

Signed-off-by: Markus Niebel <Markus.Niebel@ew.tq-group.com>
Signed-off-by: Matthias Schiffer <matthias.schiffer@ew.tq-group.com>