Support for tp-link ec220-g5

For Developers
14

Verify if pin control is correct:

&pinctrl {
        state_default: pinctrl0 {
                gpio {
                        ralink,group = "i2c", "uartf", "ephy", "rgmii2", "nd_sd";
                        ralink,function = "gpio";
                };
        };
};

gpio 2 must be turned on too:

&gpio2 {
        status = "okay";
};