arm64: dts: allwinner: pinephone: Add Bluetooth support

The PinePhone has a Realtek rtl8723cs Bluetooth controller.

Signed-off-by: Ondrej Jirman <[e-mail]>
Signed-off-by: Samuel Holland <[e-mail]>
Signed-off-by: Maxime Ripard <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]

arch/arm64/boot/dts/allwinner/sun50i-a64-pinephone.dtsi

···
 	status = "okay";
 };
 
+&uart1 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&uart1_pins>, <&uart1_rts_cts_pins>;
+	status = "okay";
+
+	bluetooth {
+		compatible = "realtek,rtl8723cs-bt";
+		device-wake-gpios = <&pio 7 6 GPIO_ACTIVE_LOW>; /* PH6 */
+		enable-gpios = <&r_pio 0 4 GPIO_ACTIVE_HIGH>; /* PL4 */
+		host-wake-gpios = <&r_pio 0 5 GPIO_ACTIVE_HIGH>; /* PL5 */
+	};
+};
+
 /* Connected to the modem (hardware flow control can't be used) */
 &uart3 {
 	pinctrl-names = "default";