qualcommax: fix switch node dtc warnings for Asus RT-AX89X

qualcommax: fix switch node dtc warnings for Asus RT-AX89X

Add the missing #address-cells and #size-cells to fix the following
dtc warnings:

ipq8074-rt-ax89x.dts:558.5-15: Warning (reg_format): /soc@0/mdio@90000/switch@10/ports/port@0:reg: property has invalid length (4 bytes) (#address-cells == 2, #size-cells == 1)
ipq8074-rt-ax89x.dts:566.5-15: Warning (reg_format): /soc@0/mdio@90000/switch@10/ports/port@1:reg: property has invalid length (4 bytes) (#address-cells == 2, #size-cells == 1)
ipq8074-rt-ax89x.dts:572.5-15: Warning (reg_format): /soc@0/mdio@90000/switch@10/ports/port@2:reg: property has invalid length (4 bytes) (#address-cells == 2, #size-cells == 1)
ipq8074-rt-ax89x.dts:578.5-15: Warning (reg_format): /soc@0/mdio@90000/switch@10/ports/port@3:reg: property has invalid length (4 bytes) (#address-cells == 2, #size-cells == 1)
ipq8074-rt-ax89x.dts:584.5-15: Warning (reg_format): /soc@0/mdio@90000/switch@10/ports/port@4:reg: property has invalid length (4 bytes) (#address-cells == 2, #size-cells == 1)
ipq8074-rt-ax89x.dts:590.5-15: Warning (reg_format): /soc@0/mdio@90000/switch@10/ports/port@5:reg: property has invalid length (4 bytes) (#address-cells == 2, #size-cells == 1)
ipq8074-rt-ax89x.dts:596.5-15: Warning (reg_format): /soc@0/mdio@90000/switch@10/ports/port@6:reg: property has invalid length (4 bytes) (#address-cells == 2, #size-cells == 1)

Signed-off-by: Shiji Yang <[email protected]>
Link: https://github.com/openwrt/openwrt/pull/18242
Signed-off-by: Hauke Mehrtens <[email protected]>