riscv: dts: starfive: jh7110-pine64-star64: enable usb0 host function

Pine64 Star64 board routes all four USB-A ports to USB0 on the SoC.
Set JH7110 on-chip USB host mode and vbus pin assignment accordingly.

Signed-off-by: E Shattow <e@freeshell.de>
Reviewed-by: Emil Renner Berthing <emil.renner.berthing@canonical.com>
Signed-off-by: Conor Dooley <conor.dooley@microchip.com>