arm64: dts: imx: Add i.mx8mm Gateworks gw7901 dts support

The Gateworks GW7901 is an ARM based single board computer (SBC)
featuring:
 - i.MX8M Mini SoC
 - LPDDR4 DRAM
 - eMMC FLASH
 - SPI FRAM
 - Gateworks System Controller (GSC)
 - Atmel ATECC Crypto Authentication
 - USB 2.0
 - Microchip GbE Switch
 - Multiple multi-protocol RS232/RS485/RS422 Serial ports
 - onboard 802.11ac WiFi / BT
 - microSD socket
 - miniPCIe socket with PCIe, USB 2.0 and dual SIM sockets
 - Wide range DC power input
 - 802.3at PoE
Signed-off-by: Tim Harvey <tharvey@gateworks.com>
Reviewed-by: Fabio Estevam <festevam@gmail.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

arch/arm64/boot/dts/freescale/Makefile

@@ -41,6 +41,7 @@ dtb-$(CONFIG_ARCH_MXC) += imx8mm-var-som-symphony.dtb
 dtb-$(CONFIG_ARCH_MXC) += imx8mm-venice-gw71xx-0x.dtb
 dtb-$(CONFIG_ARCH_MXC) += imx8mm-venice-gw72xx-0x.dtb
 dtb-$(CONFIG_ARCH_MXC) += imx8mm-venice-gw73xx-0x.dtb
+dtb-$(CONFIG_ARCH_MXC) += imx8mm-venice-gw7901.dtb
 dtb-$(CONFIG_ARCH_MXC) += imx8mn-beacon-kit.dtb
 dtb-$(CONFIG_ARCH_MXC) += imx8mn-evk.dtb
 dtb-$(CONFIG_ARCH_MXC) += imx8mn-ddr4-evk.dtb