arm64: dts: add wifi nodes support for hi6220-hikey

Add wifi nodes support for hi6220-hikey
Signed-off-by: Guodong Xu <guodong.xu@linaro.org>
Signed-off-by: Wei Xu <xuwei5@hisilicon.com>

arch/arm64/boot/dts/hisilicon/hi6220-hikey.dts

@@ -65,6 +65,35 @@ uart2: uart@f7112000 {
 		uart3: uart@f7113000 {
 			status = "ok";
 		};
+
+		dwmmc_2: dwmmc2@f723f000 {
+			ti,non-removable;
+			non-removable;
+			/* WL_EN */
+			vmmc-supply = <&wlan_en_reg>;
+
+			#address-cells = <0x1>;
+			#size-cells = <0x0>;
+			wlcore: wlcore@2 {
+				compatible = "ti,wl1835";
+				reg = <2>;	/* sdio func num */
+				/* WL_IRQ, WL_HOST_WAKE_GPIO1_3 */
+				interrupt-parent = <&gpio1>;
+				interrupts = <3 IRQ_TYPE_EDGE_RISING>;
+			};
+		};
+
+		wlan_en_reg: regulator@1 {
+			compatible = "regulator-fixed";
+			regulator-name = "wlan-en-regulator";
+			regulator-min-microvolt = <1800000>;
+			regulator-max-microvolt = <1800000>;
+			/* WLAN_EN GPIO */
+			gpio = <&gpio0 5 0>;
+			/* WLAN card specific delay */
+			startup-delay-us = <70000>;
+			enable-active-high;
+		};
 	};
 
 	leds {