dts:maury.dtsi: mmc-pwrseq added to usdc3

 a mmc-pwrseq has been added to usdhc3 that pulls WIFI_PWRDWN to high,
 that also forces the stm32 to be probed before usdhc3, so WIFI_CLK_EN
 can be enabled as hog-gpio

arch/arm64/boot/dts/seconorth/maury.dtsi

@@ -559,6 +559,14 @@ &usdhc2 { // uSD
 	status = "okay";
 };
 
+/ {
+	wifi_pwrseq: wifi-pwrseq {
+		compatible = "mmc-pwrseq-simple";
+		reset-gpios = <&stm32 38 GPIO_ACTIVE_LOW>;
+		status = "okay";
+	};
+};
+
 &usdhc3 { // WiFi
 	// more than 100MHz will not work
 	pinctrl-names = "default", "state_100mhz";
@@ -568,6 +576,7 @@ &usdhc3 { // WiFi
 	non-removable;
 	vmmc-supply = <&reg_3v3_run>;
 	vqmmc-supply = <&reg_1v8_run>;
+	mmc-pwrseq = <&wifi_pwrseq>;
 	no-sd;
 	no-mmc;
 	keep-power-in-suspend;
@@ -797,6 +806,13 @@ gpio26 {
 			line-name = "USB_HUB_RES#";
 			output-low;
 		};
+
+		gpio37 {
+			gpio-hog;
+			gpios = <37 (GPIO_OPEN_DRAIN | GPIO_ACTIVE_HIGH)>;
+			line-name = "WIFI_CLK_EN";
+			output-high;
+		};
 	};
 };