MIPS: ralink: mt7628a.dtsi: Add pinctrl DT properties to the UART nodes

Now that pinmux is available, let's use it for the UART DT nodes.
Signed-off-by: NStefan Roese <sr@denx.de>
Cc: Paul Burton <paul.burton@mips.com>
Cc: Harvey Hunt <harveyhuntnexus@gmail.com>
Cc: John Crispin <john@phrozen.org>
Signed-off-by: NPaul Burton <paul.burton@mips.com>
Cc: linux-mips@vger.kernel.org

arch/mips/boot/dts/ralink/mt7628a.dtsi

@@ -161,6 +161,9 @@
 			compatible = "ns16550a";
 			reg = <0xc00 0x100>;
 
+			pinctrl-names = "default";
+			pinctrl-0 = <&pinmux_uart0_uart>;
+
 			resets = <&resetc 12>;
 			reset-names = "uart0";
 
@@ -174,6 +177,9 @@
 			compatible = "ns16550a";
 			reg = <0xd00 0x100>;
 
+			pinctrl-names = "default";
+			pinctrl-0 = <&pinmux_uart1_uart>;
+
 			resets = <&resetc 19>;
 			reset-names = "uart1";
 
@@ -187,6 +193,9 @@
 			compatible = "ns16550a";
 			reg = <0xe00 0x100>;
 
+			pinctrl-names = "default";
+			pinctrl-0 = <&pinmux_uart2_uart>;
+
 			resets = <&resetc 20>;
 			reset-names = "uart2";