ARM: dts: rockchip: enable pwm3 as pwm regulator for rk3066a based boards

Rayeager/Bqcurie2/Marsboard use pwm3 modulate the vdd_logic voltage,
so enable it.

Signed-off-by: Andy Yan <andy.yan@rock-chips.com>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>

arch/arm/boot/dts/rk3066a-rayeager.dts

@@ -74,6 +74,18 @@
 		};
 	};
 
+	vdd_log: vdd-log {
+		compatible = "pwm-regulator";
+		pwms = <&pwm3 0 1000>;
+		regulator-name = "vdd_log";
+		regulator-min-microvolt = <1200000>;
+		regulator-max-microvolt = <1200000>;
+		regulator-always-on;
+		voltage-table = <1000000 100>,
+				<1200000 42>;
+		status = "okay";
+	};
+
 	vsys: vsys-regulator {
 		compatible = "regulator-fixed";
 		regulator-name = "vsys";
@@ -431,6 +443,10 @@
 	status = "okay";
 };
 
+&pwm3 {
+	status = "okay";
+};
+
 &saradc {
 	vref-supply = <&vcc_25>;
 	status = "okay";