ARM: dts: uniphier: Add USB3 controller nodes

Add USB3 controller nodes including usb-core, resets, regulator, ss-phy
and hs-phy. This supports for Pro4, PXs2 and the boards.

Signed-off-by: Kunihiko Hayashi <hayashi.kunihiko@socionext.com>
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>