ARM: dts: imx7d-pico: Improve WiFi regulator name

There are different models of WiFi being used in the SoM and the
handle name was too restrictive. This reworks it to a more generic and
meaningful name.
Signed-off-by: NOtavio Salvador <otavio@ossystems.com.br>
Signed-off-by: NShawn Guo <shawnguo@kernel.org>

arch/arm/boot/dts/imx7d-pico.dtsi

@@ -13,11 +13,11 @@
 		reg = <0x80000000 0>;
 	};
 
-	reg_ap6212: regulator-ap6212 {
+	reg_wlreg_on: regulator-wlreg_on {
 		compatible = "regulator-fixed";
 		pinctrl-names = "default";
-		pinctrl-0 = <&pinctrl_reg_ap6212>;
-		regulator-name = "AP6212";
+		pinctrl-0 = <&pinctrl_reg_wlreg_on>;
+		regulator-name = "wlreg_on";
 		regulator-min-microvolt = <3300000>;
 		regulator-max-microvolt = <3300000>;
 		gpio = <&gpio4 16 GPIO_ACTIVE_HIGH>;
@@ -241,7 +241,7 @@
 	non-removable;
 	keep-power-in-suspend;
 	wakeup-source;
-	vmmc-supply = <&reg_ap6212>;
+	vmmc-supply = <&reg_wlreg_on>;
 	mmc-pwrseq = <&usdhc2_pwrseq>;
 	status = "okay";
 };
@@ -302,7 +302,7 @@
 		>;
 	};
 
-	pinctrl_reg_ap6212: regap6212grp {
+	pinctrl_reg_wlreg_on: regregongrp {
 		fsl,pins = <
 			MX7D_PAD_ECSPI1_SCLK__GPIO4_IO16	0x59
 		>;