board: kontron: pitx-imx8m: Add Kontron pitx-imx8m board support

The Kontron pitx-imx8m is an NXP i.MX8MQ based board in the pITX form factor.

Signed-off-by: Heiko Thiery <heiko.thiery@gmail.com>
diff --git a/arch/arm/dts/Makefile b/arch/arm/dts/Makefile
index a98dfc4..191af76 100644
--- a/arch/arm/dts/Makefile
+++ b/arch/arm/dts/Makefile
@@ -921,7 +921,8 @@
 	imx8mq-phanbell.dtb \
 	imx8mp-evk.dtb \
 	imx8mp-phyboard-pollux-rdk.dtb \
-	imx8mq-pico-pi.dtb
+	imx8mq-pico-pi.dtb \
+	imx8mq-kontron-pitx-imx8m.dtb
 
 dtb-$(CONFIG_ARCH_IMXRT) += imxrt1050-evk.dtb \
 	imxrt1020-evk.dtb