imx: coretexa53: fix network configuration for GW74xx
The GW74xx's first RJ45 is eth0 which should be the WAN adapter, not
eth1 which is the CPU uplink port to the switch.
Signed-off-by: Tim Harvey <[email protected]>
Link: https://github.com/openwrt/openwrt/pull/15736
Signed-off-by: Robert Marko <[email protected]>