ARM: dts: sun7i: olimex-lime2: Add regulators for GPIO banks

Make sure that A20 Olimex Lime2 pin bank regulators are
properly represented.

While pin banks A, B and F are connected to 3.3V static
regulator, pin banks E and G tied with LDO3 and LDO4 regulators
with 2.8V reference.
Signed-off-by: Priit Laes <priit.laes@paf.com>
Signed-off-by: Maxime Ripard <maxime.ripard@bootlin.com>

arch/arm/boot/dts/sun7i-a20-olinuxino-lime2.dts

@@ -174,6 +174,12 @@ &otg_sram {
 };
 
 &pio {
+	vcc-pa-supply = <&reg_vcc3v3>;
+	vcc-pc-supply = <&reg_vcc3v3>;
+	vcc-pe-supply = <&reg_ldo3>;
+	vcc-pf-supply = <&reg_vcc3v3>;
+	vcc-pg-supply = <&reg_ldo4>;
+
 	led_pins_olinuxinolime: led-pins {
 		pins = "PH2";
 		function = "gpio_out";