ARM: dts: imx6sx-sdb: 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-sdb.dtsi

@@ -564,17 +564,17 @@ MX6SX_PAD_CSI_PIXCLK__AUDMUX_MCLK	0x130b0
 
 		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_uart5: uart5grp {
 			fsl,pins = <
-				MX6SX_PAD_KEY_ROW3__UART5_RX		0x1b0b1
-				MX6SX_PAD_KEY_COL3__UART5_TX		0x1b0b1
-				MX6SX_PAD_KEY_ROW2__UART5_CTS_B		0x1b0b1
-				MX6SX_PAD_KEY_COL2__UART5_RTS_B		0x1b0b1
+				MX6SX_PAD_KEY_ROW3__UART5_DCE_RX	0x1b0b1
+				MX6SX_PAD_KEY_COL3__UART5_DCE_TX	0x1b0b1
+				MX6SX_PAD_KEY_ROW2__UART5_DCE_CTS	0x1b0b1
+				MX6SX_PAD_KEY_COL2__UART5_DCE_RTS	0x1b0b1
 			>;
 		};