arm64: dts: rockchip: add wolfvision pf5 io expander board

Add device tree overlay for the WolfVision PF5 IO Expander board. This
extension board can be attached to the WolfVision PF5 mainboard and
features
 - TI DP83826 Ethernet PHY
 - RJ45 jack
 - USB-A host port

Signed-off-by: Michael Riesch <michael.riesch@wolfvision.net>
Link: https://lore.kernel.org/r/20240325-feature-wolfvision-pf5-v1-4-5725445f792a@wolfvision.net


Signed-off-by: Heiko Stuebner <heiko@sntech.de>