Add EV-iMX280-NANO-X-MB board

A simple prototyping board with one microSD port, one Ethernet port,
2 USB ports, I2C, SPI, GPIO, and UART interfaces.

Signed-off-by: Oleh Kravchenko <oleg@kaa.org.ua>
Cc: Stefano Babic <sbabic@denx.de>
diff --git a/arch/arm/dts/Makefile b/arch/arm/dts/Makefile
index b944778..d29844e 100644
--- a/arch/arm/dts/Makefile
+++ b/arch/arm/dts/Makefile
@@ -822,6 +822,9 @@
 dtb-$(CONFIG_O4_IMX_NANO) += \
 	o4-imx-nano.dtb
 
+dtb-$(CONFIG_EV_IMX280_NANO_X_MB) += \
+	ev-imx280-nano-x-mb.dtb
+
 dtb-$(CONFIG_MX7) += imx7d-sdb.dtb \
 	imx7d-sdb-qspi.dtb \
 	imx7-cm.dtb \