ARM: imx6: Add DHCOM i.MX6 PDK board support

Add support for the DHCOM i.MX6 PDK board. This board has:
- FEC ethernet
- EHCI USB host
- 3x SDMMC

Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Stefano Babic <sbabic@denx.de>
diff --git a/arch/arm/mach-imx/mx6/Kconfig b/arch/arm/mach-imx/mx6/Kconfig
index 540f2b2..b82db3a 100644
--- a/arch/arm/mach-imx/mx6/Kconfig
+++ b/arch/arm/mach-imx/mx6/Kconfig
@@ -129,6 +129,15 @@
 	select DM_SERIAL
 	select DM_THERMAL
 
+config TARGET_DHCOMIMX6
+	bool "dh_imx6"
+	select BOARD_LATE_INIT
+	select BOARD_EARLY_INIT_F
+	select SUPPORT_SPL
+	select DM
+	select DM_THERMAL
+	imply CMD_SPL
+
 config TARGET_EMBESTMX6BOARDS
 	bool "embestmx6boards"
 	select BOARD_LATE_INIT
@@ -428,6 +437,7 @@
 source "board/ccv/xpress/Kconfig"
 source "board/compulab/cm_fx6/Kconfig"
 source "board/congatec/cgtqmx6eval/Kconfig"
+source "board/dhelectronics/dh_imx6/Kconfig"
 source "board/el/el6x/Kconfig"
 source "board/embest/mx6boards/Kconfig"
 source "board/engicam/geam6ul/Kconfig"