ath79: migrate GPIO numbering with OpenWrt 24.10

[blocktrron]

OpenWrt 24.10 changed the starting index of GPIO lines of the SoC:

openwrt/openwrt@ee01666

It needs to be verified if we need to migrate those. One potential device is the CPE210 and its PoE passthrough switch.

[maurerle]

I tested this on a CPE210.

Activating PoE passthrough did work fine.
The GPIO pin was successfully migrated to the new Pins

system.poe_passthrough=gpio_switch
system.poe_passthrough.name='PoE Passthrough'
system.poe_passthrough.gpio_pin='532'
system.poe_passthrough.value='1'

I did update from v2022 to gluon-main with poe disabled which kept the setting.
Did enable poe successfully.
Did downgrade to v2023.2.3 successfully with keeping the poe setting.
Did upgrade back to gluon main with keeping the PoE setting successfully.

So it looks like everything works fine with the GPIO change for the PoE passthrough