[E81][DTS] Add uSD slot on SDC2 interface (sdhc_2)

Increase drive-strength to 10 and add bias-pull-up as per Qualcomm suggestion. Let vreg_l6c_2v96 voltage switch between 3.3V and 1.8 Add reg_3v3_SDCARD as card power supply Use GPIO_91 as card detect

arch/arm64/boot/dts/seco/include/baseboard-e81-b79.dtsi

@@ -85,10 +85,10 @@ reg_3v3_aud: 3v3_aud {
 		regulator-always-on;
 	};
 
-	reg_3v3_SDCARD: reg_3v3_SDCARD {
+	reg_3v3_sdcard: reg_3v3_sdcard {
 		compatible = "regulator-fixed";
 		regulator-name = "3.3V_SDCARD";
-		vin-supply = <&reg_5v_run>;
+		vin-supply = <&reg_3v3_a>;
 		regulator-min-microvolt = <3300000>;
 		regulator-max-microvolt = <3300000>;
 		gpio = <&stm32 21 GPIO_ACTIVE_HIGH>;