arm64: dts: imx8mm-venice-gw7901: enable pull-down on gpio outputs

Enable internal pull-down on UART transceiver GPIO config pins.

Signed-off-by: Tim Harvey <tharvey@gateworks.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

arch/arm64/boot/dts/freescale/imx8mm-venice-gw7901.dts

@@ -875,9 +875,9 @@
 
 	pinctrl_uart3_gpio: uart3gpiogrp {
 		fsl,pins = <
-			MX8MM_IOMUXC_SAI1_RXD4_GPIO4_IO6	0x40000041 /* RS232# */
-			MX8MM_IOMUXC_SAI1_RXD5_GPIO4_IO7	0x40000041 /* RS422# */
-			MX8MM_IOMUXC_SAI1_RXD6_GPIO4_IO8	0x40000041 /* RS485# */
+			MX8MM_IOMUXC_SAI1_RXD4_GPIO4_IO6	0x40000110 /* RS232# */
+			MX8MM_IOMUXC_SAI1_RXD5_GPIO4_IO7	0x40000110 /* RS422# */
+			MX8MM_IOMUXC_SAI1_RXD6_GPIO4_IO8	0x40000110 /* RS485# */
 		>;
 	};