arm: imx8m: add support for Compulab iot-gate-imx8 (imx8mm-cl-iot-gate)

Add initial support for Compulab iot-gate-imx8 board (imx8mm-cl-iot-gate).
The initial support includes:
 - MMC
 - eMMC
 - I2C
 - FEC
 - Serial console

Signed-off-by: Kirill Kapranov <kirill.kapranov@compulab.co.il>
Signed-off-by: Uri Mashiach <uri.mashiach@compulab.co.il>
Signed-off-by: Valentin Raevsky <valentin@compulab.co.il>
Signed-off-by: Ying-Chun Liu (PaulLiu) <paul.liu@linaro.org>
Cc: Peter Robinson <pbrobinson@gmail.com>
diff --git a/arch/arm/mach-imx/imx8m/Kconfig b/arch/arm/mach-imx/imx8m/Kconfig
index 171f36e..c67de67 100644
--- a/arch/arm/mach-imx/imx8m/Kconfig
+++ b/arch/arm/mach-imx/imx8m/Kconfig
@@ -124,6 +124,13 @@
 	select IMX8MP
         select SUPPORT_SPL
 	select IMX8M_LPDDR4
+
+config TARGET_IMX8MM_CL_IOT_GATE
+	bool "CompuLab iot-gate-imx8"
+	select BINMAN
+	select IMX8MM
+	select SUPPORT_SPL
+	select IMX8M_LPDDR4
 endchoice
 
 source "board/engicam/imx8mm/Kconfig"
@@ -139,5 +146,6 @@
 source "board/beacon/imx8mn/Kconfig"
 source "board/phytec/phycore_imx8mm/Kconfig"
 source "board/phytec/phycore_imx8mp/Kconfig"
+source "board/compulab/imx8mm-cl-iot-gate/Kconfig"
 
 endif