riscv: dts: starfive: Enable pcie0 dts node

In StarFive VF2 board. pcie0 connect to VTI usb controller.
Enable it to support usb host.

Signed-off-by: Minda Chen <minda.chen@starfivetech.com>
Reviewed-by: Leo Yu-Chi Liang <ycliang@andestech.com>