ARM: dts: imx6qdl: add a new pinctrl for uart3

Add the a new pinctrl for uart3. In the imx6q{dl}-sabreauto boards,
the uart3 is used for Bluetooth.
Signed-off-by: Huang Shijie <b32955@freescale.com>
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>

arch/arm/boot/dts/imx6qdl.dtsi

@@ -1028,6 +1028,17 @@ MX6QDL_PAD_EIM_D29__UART2_DTE_RTS_B 0x1b0b1
 					};
 				};
 
+				uart3 {
+					pinctrl_uart3_1: uart3grp-1 {
+						fsl,pins = <
+							MX6QDL_PAD_SD4_CLK__UART3_RX_DATA 0x1b0b1
+							MX6QDL_PAD_SD4_CMD__UART3_TX_DATA 0x1b0b1
+							MX6QDL_PAD_EIM_D30__UART3_CTS_B   0x1b0b1
+							MX6QDL_PAD_EIM_EB3__UART3_RTS_B   0x1b0b1
+						>;
+					};
+				};
+
 				uart4 {
 					pinctrl_uart4_1: uart4grp-1 {
 						fsl,pins = <