Zephyr level shifter GPIO abstraction

board.dts

/dts-v1/

/ {
    shifter: 74hc595a@0 {
        compatible = "ti,xx74hc595a";

        a-gpios = <&gpio0 0 GPIO_ACTIVE_HIGH>;
        b-gpios = <&gpio0 0 GPIO_ACTIVE_HIGH>;
        c-gpios = <&gpio0 0 GPIO_ACTIVE_HIGH>;
    }

    kscan: kscan0 {
        compatible = "zmk,kscan-gpio-matrix";
        diode-direction = "col2row";

        col-gpios =
        <&shifter 0 GPIO_ACTIVE_HIGH>,
        <&shifter 1 GPIO_ACTIVE_HIGH>,
        <&shifter 2 GPIO_ACTIVE_HIGH>,
        <&shifter 3 GPIO_ACTIVE_HIGH>,
        <&shifter 4 GPIO_ACTIVE_HIGH>
        ;

        row-gpios = <&gpio0 0 GPIO_ACTIVE_HIGH GPIO_PULL_DOWN>;
    }
}