ARM: dts: imx6qdl-sabrelite: Add uart1 support

Uart1 is available on Sabre Lite.
Signed-off-by: Troy Kisky <troy.kisky@boundarydevices.com>
Reviewed-by: Marek Vasut <marex@denx.de>
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>

arch/arm/boot/dts/imx6qdl-sabrelite.dtsi

@@ -170,6 +170,13 @@ MX6QDL_PAD_EIM_D28__I2C1_SDA		0x4001b8b1
 			>;
 		};
 
+		pinctrl_uart1: uart1grp {
+			fsl,pins = <
+				MX6QDL_PAD_SD3_DAT7__UART1_TX_DATA	0x1b0b1
+				MX6QDL_PAD_SD3_DAT6__UART1_RX_DATA	0x1b0b1
+			>;
+		};
+
 		pinctrl_uart2: uart2grp {
 			fsl,pins = <
 				MX6QDL_PAD_EIM_D26__UART2_TX_DATA	0x1b0b1
@@ -241,6 +248,12 @@ &ssi1 {
 	status = "okay";
 };
 
+&uart1 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&pinctrl_uart1>;
+	status = "okay";
+};
+
 &uart2 {
 	pinctrl-names = "default";
 	pinctrl-0 = <&pinctrl_uart2>;