ARM: dts: sun7i: Add uart3/4/5, i2c3 and spi2 pinmux

This patch add generic dts node for uart3/4/5, i2c3 and spi2.
Reviewed-by: NChen-Yu Tsai <wens@csie.org>
Signed-off-by: NWills Wang <wills.wang.open@gmail.com>
Signed-off-by: NMaxime Ripard <maxime.ripard@free-electrons.com>

arch/arm/boot/dts/sun7i-a20.dtsi

@@ -634,6 +634,27 @@
 				allwinner,pull = <0>;
 			};
 
+			uart3_pins_a: uart3@0 {
+				allwinner,pins = "PG6", "PG7", "PG8", "PG9";
+				allwinner,function = "uart3";
+				allwinner,drive = <0>;
+				allwinner,pull = <0>;
+			};
+
+			uart4_pins_a: uart4@0 {
+				allwinner,pins = "PG10", "PG11";
+				allwinner,function = "uart4";
+				allwinner,drive = <0>;
+				allwinner,pull = <0>;
+			};
+
+			uart5_pins_a: uart5@0 {
+				allwinner,pins = "PI10", "PI11";
+				allwinner,function = "uart5";
+				allwinner,drive = <0>;
+				allwinner,pull = <0>;
+			};
+
 			uart6_pins_a: uart6@0 {
 				allwinner,pins = "PI12", "PI13";
 				allwinner,function = "uart6";
@@ -669,6 +690,13 @@
 				allwinner,pull = <0>;
 			};
 
+			i2c3_pins_a: i2c3@0 {
+				allwinner,pins = "PI0", "PI1";
+				allwinner,function = "i2c3";
+				allwinner,drive = <0>;
+				allwinner,pull = <0>;
+			};
+
 			emac_pins_a: emac0@0 {
 				allwinner,pins = "PA0", "PA1", "PA2",
 						"PA3", "PA4", "PA5", "PA6",
@@ -734,6 +762,13 @@
 				allwinner,pull = <0>;
 			};
 
+			spi2_pins_b: spi2@1 {
+				allwinner,pins = "PB14", "PB15", "PB16", "PB17";
+				allwinner,function = "spi2";
+				allwinner,drive = <0>;
+				allwinner,pull = <0>;
+			};
+
 			mmc0_pins_a: mmc0@0 {
 				allwinner,pins = "PF0","PF1","PF2","PF3","PF4","PF5";
 				allwinner,function = "mmc0";