Bluetooth: Use proper bluetooth driver

[ts-kris]

See TS-7680:

&auart0 {
        pinctrl-names = "default";
        pinctrl-0 = <&auart0_pins_a>;
        status = "okay";

        bluetooth {
                compatible = "ti,wl1271-st";
                enable-gpios = <&gpio8 45 GPIO_ACTIVE_HIGH>;
        };
};

Other plats should be able to use something similar and negate the need to toggle IO and deal with manually running btattach