arm64: dt: imx93: tqma9352-mba93xxla: Fix LPUART2 pad config

LPUART2_RTS# has an external pull-down, so do not enable the internal
pull-up at the same time, use a pull-down instead.

Fixes: c982ecfa ("arm64: dts: freescale: add initial device tree for MBa93xxLA SBC board")
Signed-off-by: Alexander Stein <alexander.stein@ew.tq-group.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

arch/arm64/boot/dts/freescale/imx93-tqma9352-mba93xxla.dts

@@ -577,7 +577,7 @@ pinctrl_uart2: uart2grp {
 		fsl,pins = <
 			MX93_PAD_UART2_TXD__LPUART2_TX		0x31e
 			MX93_PAD_UART2_RXD__LPUART2_RX		0x31e
-			MX93_PAD_SAI1_TXD0__LPUART2_RTS_B	0x31e
+			MX93_PAD_SAI1_TXD0__LPUART2_RTS_B	0x51e
 		>;
 	};