ramips: mt7621: fix PCIe nodes in Telco Electronics X1 DTS

ramips: mt7621: fix PCIe nodes in Telco Electronics X1 DTS

Fixes following DTC warnings:

 Warning (avoid_default_addr_size): /pcie@1e140000/pcie0/wifi@0,0: Relying on default #address-cells value
 Warning (avoid_default_addr_size): /pcie@1e140000/pcie0/wifi@0,0: Relying on default #size-cells value
 Warning (avoid_default_addr_size): /pcie@1e140000/pcie1/wifi@0,0: Relying on default #address-cells value
 Warning (avoid_default_addr_size): /pcie@1e140000/pcie1/wifi@0,0: Relying on default #size-cells value

Fixes: 73e0f52b6e4e ("ramips: add support for Telco Electronics X1")
Cc: Nicholas Smith <mips171@icloud.com>
Signed-off-by: Petr Štetiar <ynezz@true.cz>