arm64: dts: mt7622: add built-in Wi-Fi device nodes

This enables built-in 802.11n Wi-Fi support. It's 2.4GHz only.
Signed-off-by: Ryder Lee <ryder.lee@mediatek.com>
Signed-off-by: Matthias Brugger <matthias.bgg@gmail.com>

arch/arm64/boot/dts/mediatek/mt7622-bananapi-bpi-r64.dts

@@ -543,3 +543,7 @@ &watchdog {
 	pinctrl-0 = <&watchdog_pins>;
 	status = "okay";
 };
+
+&wmac {
+	status = "okay";
+};

arch/arm64/boot/dts/mediatek/mt7622-rfb1.dts

@@ -506,3 +506,7 @@ &watchdog {
 	pinctrl-0 = <&watchdog_pins>;
 	status = "okay";
 };
+
+&wmac {
+	status = "okay";
+};

arch/arm64/boot/dts/mediatek/mt7622.dtsi

@@ -699,6 +699,17 @@ mmc1: mmc@11240000 {
 		status = "disabled";
 	};
 
+	wmac: wmac@18000000 {
+		compatible = "mediatek,mt7622-wmac";
+		reg = <0 0x18000000 0 0x100000>;
+		interrupts = <GIC_SPI 211 IRQ_TYPE_LEVEL_LOW>;
+
+		mediatek,infracfg = <&infracfg>;
+		status = "disabled";
+
+		power-domains = <&scpsys MT7622_POWER_DOMAIN_WB>;
+	};
+
 	ssusbsys: ssusbsys@1a000000 {
 		compatible = "mediatek,mt7622-ssusbsys",
 			     "syscon";