imx: Add support for i.MX8MM Beacon EmbeddedWorks devkit.

Beacon EmbeddedWorks, formerly known as Logic PD, is releasing
a devkit based on the i.MX8M Mini SoC consisting of baseboard +
SOM.

It supports eMMC on the SOM, microSD on the baseboard, various
GPIO, the PINCTRL, and UART.

Signed-off-by: Adam Ford <aford173@gmail.com>
diff --git a/arch/arm/mach-imx/imx8m/Kconfig b/arch/arm/mach-imx/imx8m/Kconfig
index 7d1fe75..7771fc8 100644
--- a/arch/arm/mach-imx/imx8m/Kconfig
+++ b/arch/arm/mach-imx/imx8m/Kconfig
@@ -66,6 +66,12 @@
        select SUPPORT_SPL
        select IMX8M_LPDDR4
 
+config TARGET_IMX8MM_BEACON
+	bool "imx8mm Beacon Embedded devkit"
+	select IMX8MM
+	select SUPPORT_SPL
+	select IMX8M_LPDDR4
+
 endchoice
 
 source "board/freescale/imx8mq_evk/Kconfig"
@@ -75,5 +81,6 @@
 source "board/google/imx8mq_phanbell/Kconfig"
 source "board/technexion/pico-imx8mq/Kconfig"
 source "board/toradex/verdin-imx8mm/Kconfig"
+source "board/beacon/imx8mm/Kconfig"
 
 endif