arm64: dts: imx: Add i.mx8mm Gateworks gw7903 dts support
The GW7903 is based on the i.MX 8M Mini SoC featuring:
- LPDDR4 DRAM
- eMMC FLASH
- microSD connector with UHS support
- LIS2DE12 3-axis accelerometer
- Gateworks System Controller
- IMX8M FEC
- software selectable RS232/RS485/RS422 serial transceiver
- PMIC
- 2x off-board bi-directional opto-isolated digital I/O
- 1x M.2 A-E Key Socket and 1x MiniPCIe socket with USB2.0 and PCIe
(resistor loading to route PCIe/USB2 between M.2 and MiniPCIe socket)
Signed-off-by: Tim Harvey <tharvey@gateworks.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>