arm: allwinner: dts: a20: Sync A20 dts(i) files from Linux 5.1-rc2

Sync sun7i-a20 dts(i) files from Linux 5.1-rc2

Linux commit details about the sun7i-a20* sync:
"ARM: dts: sun7i: bananapi: Add GPIO banks regulators"
(sha1: 09c6572290f018d73ec2e812e28bada34d41815f)

Here are U-Boot specific dts changes.

- s/uart0_pins_a/uart0_pb_pins for
  sun7i-a20-ainol-aw1.dts
  sun7i-a20-m5.dts
  sun7i-a20-primo73.dts
  sun7i-a20-yones-toptech-bd1078.dts
  sunxi-itead-core-common.dtsi
- s/gmac_pins_mii_a/gmac_rgmii_pins for
  sun7i-a20-m5.dts
- drop i2c0, i2c1 pins from
  sunxi-itead-core-common.dtsi
- drop mmc0 pins from
  sun7i-a20-primo73.dts

Signed-off-by: Jagan Teki <jagan@amarulasolutions.com>
diff --git a/arch/arm/dts/sunxi-itead-core-common.dtsi b/arch/arm/dts/sunxi-itead-core-common.dtsi
index 2565d51..0d002f8 100644
--- a/arch/arm/dts/sunxi-itead-core-common.dtsi
+++ b/arch/arm/dts/sunxi-itead-core-common.dtsi
@@ -65,8 +65,6 @@
 };
 
 &i2c0 {
-	pinctrl-names = "default";
-	pinctrl-0 = <&i2c0_pins_a>;
 	status = "okay";
 
 	axp209: pmic@34 {
@@ -75,8 +73,6 @@
 };
 
 &i2c1 {
-	pinctrl-names = "default";
-	pinctrl-0 = <&i2c1_pins_a>;
 	status = "okay";
 };
 
@@ -125,7 +121,7 @@
 
 &uart0 {
 	pinctrl-names = "default";
-	pinctrl-0 = <&uart0_pins_a>;
+	pinctrl-0 = <&uart0_pb_pins>;
 	status = "okay";
 };