ARM: dts: imx6sx-nitrogen6sx: Use new pin names with DCE/DTE for UART pins

Use new pin names containing DCE/DTE for UART RX/TX/RTS/CTS pins, this
is to distinguish the DCE/DTE functions.
Signed-off-by: Anson Huang <Anson.Huang@nxp.com>
Reviewed-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

arch/arm/boot/dts/imx6sx-nitrogen6sx.dts

@@ -484,31 +484,31 @@ MX6SX_PAD_QSPI1A_SS0_B__GPIO4_IO_22	0xb0b0
 
 	pinctrl_uart1: uart1grp {
 		fsl,pins = <
-			MX6SX_PAD_GPIO1_IO04__UART1_TX		0x1b0b1
-			MX6SX_PAD_GPIO1_IO05__UART1_RX		0x1b0b1
+			MX6SX_PAD_GPIO1_IO04__UART1_DCE_TX		0x1b0b1
+			MX6SX_PAD_GPIO1_IO05__UART1_DCE_RX		0x1b0b1
 		>;
 	};
 
 	pinctrl_uart2: uart2grp {
 		fsl,pins = <
-			MX6SX_PAD_GPIO1_IO06__UART2_TX		0x1b0b1
-			MX6SX_PAD_GPIO1_IO07__UART2_RX		0x1b0b1
+			MX6SX_PAD_GPIO1_IO06__UART2_DCE_TX		0x1b0b1
+			MX6SX_PAD_GPIO1_IO07__UART2_DCE_RX		0x1b0b1
 		>;
 	};
 
 	pinctrl_uart3: uart3grp {
 		fsl,pins = <
-			MX6SX_PAD_QSPI1B_SS0_B__UART3_TX	0x1b0b1
-			MX6SX_PAD_QSPI1B_SCLK__UART3_RX		0x1b0b1
+			MX6SX_PAD_QSPI1B_SS0_B__UART3_DCE_TX		0x1b0b1
+			MX6SX_PAD_QSPI1B_SCLK__UART3_DCE_RX		0x1b0b1
 		>;
 	};
 
 	pinctrl_uart5: uart5grp {
 		fsl,pins = <
-			MX6SX_PAD_KEY_COL3__UART5_TX		0x1b0b1
-			MX6SX_PAD_KEY_ROW3__UART5_RX		0x1b0b1
-			MX6SX_PAD_SD3_DATA6__UART3_RTS_B	0x1b0b1
-			MX6SX_PAD_SD3_DATA7__UART3_CTS_B	0x1b0b1
+			MX6SX_PAD_KEY_COL3__UART5_DCE_TX		0x1b0b1
+			MX6SX_PAD_KEY_ROW3__UART5_DCE_RX		0x1b0b1
+			MX6SX_PAD_SD3_DATA6__UART3_DCE_RTS		0x1b0b1
+			MX6SX_PAD_SD3_DATA7__UART3_DCE_CTS		0x1b0b1
 		>;
 	};