ARM: dts: imx: Add support for DH electronics i.MX8M Plus DHCOM and PDK2

Add support for DH electronics i.MX8M Plus DHCOM SoM on PDK2 carrier board.
Currently supported are serial console, EQoS and FEC ethernets, eMMC, SD,
SPI NOR and USB 3.0 host.

Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Fabio Estevam <festevam@denx.de>
Cc: Peng Fan <peng.fan@nxp.com>
Cc: Stefano Babic <sbabic@denx.de>
diff --git a/board/dhelectronics/dh_imx8mp/MAINTAINERS b/board/dhelectronics/dh_imx8mp/MAINTAINERS
new file mode 100644
index 0000000..7c70cfd
--- /dev/null
+++ b/board/dhelectronics/dh_imx8mp/MAINTAINERS
@@ -0,0 +1,8 @@
+DH electronics DHCOM Premium Developer Kit (2) i.MX8M Plus
+M:	Marek Vasut <marex@denx.de>
+S:	Maintained
+F:	arch/arm/dts/imx8mp-dhcom-pdk2.dts
+F:	arch/arm/dts/imx8mp-dhcom-pdk2-u-boot.dtsi
+F:	board/dhelectronics/imx8mp_dhcom_pdk2/
+F:	configs/imx8mp_dhcom_pdk2_defconfig
+F:	include/configs/imx8mp_dhcom_pdk2.h