ARM: sun6i: Add the reset controller to the DTSI

The A31 has a reset controller IP that maintains a few other IPs in
reset, among which we can find the UARTs, high speed timers or the I2C.
Now that we have support for them, add the reset controllers to the DTSI.
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Acked-by: Philipp Zabel <p.zabel@pengutronix.de>

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

@@ -209,6 +209,24 @@ uart0_pins_a: uart0@0 {
 			};
 		};
 
+		ahb1_rst: reset@01c202c0 {
+			#reset-cells = <1>;
+			compatible = "allwinner,sun6i-a31-ahb1-reset";
+			reg = <0x01c202c0 0xc>;
+		};
+
+		apb1_rst: reset@01c202d0 {
+			#reset-cells = <1>;
+			compatible = "allwinner,sun6i-a31-clock-reset";
+			reg = <0x01c202d0 0x4>;
+		};
+
+		apb2_rst: reset@01c202d8 {
+			#reset-cells = <1>;
+			compatible = "allwinner,sun6i-a31-clock-reset";
+			reg = <0x01c202d8 0x4>;
+		};
+
 		timer@01c20c00 {
 			compatible = "allwinner,sun4i-timer";
 			reg = <0x01c20c00 0xa0>;
@@ -232,6 +250,7 @@ uart0: serial@01c28000 {
 			reg-shift = <2>;
 			reg-io-width = <4>;
 			clocks = <&apb2_gates 16>;
+			resets = <&apb2_rst 16>;
 			status = "disabled";
 		};
 
@@ -242,6 +261,7 @@ uart1: serial@01c28400 {
 			reg-shift = <2>;
 			reg-io-width = <4>;
 			clocks = <&apb2_gates 17>;
+			resets = <&apb2_rst 17>;
 			status = "disabled";
 		};
 
@@ -252,6 +272,7 @@ uart2: serial@01c28800 {
 			reg-shift = <2>;
 			reg-io-width = <4>;
 			clocks = <&apb2_gates 18>;
+			resets = <&apb2_rst 18>;
 			status = "disabled";
 		};
 
@@ -262,6 +283,7 @@ uart3: serial@01c28c00 {
 			reg-shift = <2>;
 			reg-io-width = <4>;
 			clocks = <&apb2_gates 19>;
+			resets = <&apb2_rst 19>;
 			status = "disabled";
 		};
 
@@ -272,6 +294,7 @@ uart4: serial@01c29000 {
 			reg-shift = <2>;
 			reg-io-width = <4>;
 			clocks = <&apb2_gates 20>;
+			resets = <&apb2_rst 20>;
 			status = "disabled";
 		};
 
@@ -282,6 +305,7 @@ uart5: serial@01c29400 {
 			reg-shift = <2>;
 			reg-io-width = <4>;
 			clocks = <&apb2_gates 21>;
+			resets = <&apb2_rst 21>;
 			status = "disabled";
 		};