ARM: dts: sun6i: hummingbird: Enable P2WI controller

The Hummingbird A31 has an AXP221 PMIC hooked up to the P2WI controller.
Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>

arch/arm/boot/dts/sun6i-a31-hummingbird.dts

@@ -140,6 +140,10 @@ mmc0_cd_pin_hummingbird: mmc0_cd_pin@0 {
 	};
 };
 
+&p2wi {
+	status = "okay";
+};
+
 &reg_usb1_vbus {
 	gpio = <&pio 7 24 GPIO_ACTIVE_HIGH>; /* PH24 */
 	status = "okay";