ARM: dts: imx6q{dl}: add a DTE uart pinctrl for uart2

In the arm2 board, the UART2 works in the dte mode.
So add a pinctrl for both the imx6q{dl} boards.
Signed-off-by: Huang Shijie <b32955@freescale.com>
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>

arch/arm/boot/dts/imx6dl.dtsi

@@ -230,6 +230,15 @@ MX6DL_PAD_EIM_D26__UART2_TX_DATA 0x1b0b1
 							MX6DL_PAD_EIM_D27__UART2_RX_DATA 0x1b0b1
 						>;
 					};
+
+					pinctrl_uart2_2: uart2grp-2 { /* DTE mode */
+						fsl,pins = <
+							MX6DL_PAD_EIM_D26__UART2_RX_DATA   0x1b0b1
+							MX6DL_PAD_EIM_D27__UART2_TX_DATA   0x1b0b1
+							MX6DL_PAD_EIM_D28__UART2_DTE_CTS_B 0x1b0b1
+							MX6DL_PAD_EIM_D29__UART2_DTE_RTS_B 0x1b0b1
+						>;
+					};
 				};
 
 				uart4 {

arch/arm/boot/dts/imx6q.dtsi

@@ -266,6 +266,15 @@ MX6Q_PAD_EIM_D26__UART2_TX_DATA 0x1b0b1
 							MX6Q_PAD_EIM_D27__UART2_RX_DATA 0x1b0b1
 						>;
 					};
+
+					pinctrl_uart2_2: uart2grp-2 { /* DTE mode */
+						fsl,pins = <
+							MX6Q_PAD_EIM_D26__UART2_RX_DATA   0x1b0b1
+							MX6Q_PAD_EIM_D27__UART2_TX_DATA   0x1b0b1
+							MX6Q_PAD_EIM_D28__UART2_DTE_CTS_B 0x1b0b1
+							MX6Q_PAD_EIM_D29__UART2_DTE_RTS_B 0x1b0b1
+						>;
+					};
 				};
 
 				uart4 {