arm64: dts: imx8mp: Add DT overlay describing i.MX8MP DHCOM SoM rev.100

The current imx8mp-dhcom-som.dtsi describes production rev.200 SoM,
add DT overlay which reinstates rev.100 SoM description to permit
prototype rev.100 SoMs to be used until they get phased out.

Signed-off-by: Marek Vasut <marex@denx.de>
diff --git a/arch/arm/dts/Makefile b/arch/arm/dts/Makefile
index 50bdb29..99d8e89 100644
--- a/arch/arm/dts/Makefile
+++ b/arch/arm/dts/Makefile
@@ -1064,11 +1064,13 @@
 	imx8mq-phanbell.dtb \
 	imx8mp-beacon-kit.dtb \
 	imx8mp-data-modul-edm-sbc.dtb \
+	imx8mp-dhcom-som-overlay-rev100.dtbo \
 	imx8mp-dhcom-som-overlay-eth1xfast.dtbo \
 	imx8mp-dhcom-som-overlay-eth2xfast.dtbo \
 	imx8mp-dhcom-pdk-overlay-eth2xfast.dtbo \
 	imx8mp-dhcom-pdk2.dtb \
 	imx8mp-dhcom-pdk3.dtb \
+	imx8mp-dhcom-pdk3-overlay-rev100.dtbo \
 	imx8mp-evk.dtb \
 	imx8mp-icore-mx8mp-edimm2.2.dtb \
 	imx8mp-msc-sm2s.dtb \