ARM: dts: r9a06g032: Link the PCI USB devices to the USB PHY

Describe the PCI USB devices that are behind the PCI bridge, adding
necessary links to the USB PHY device.

Signed-off-by: Herve Codina <herve.codina@bootlin.com>
Link: https://lore.kernel.org/r/20220429134143.628428-8-herve.codina@bootlin.com


Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>