dm: Change CMD_DM enabling

CMD_DM is used for debug purpose and it shouldn't be enabled by default
via Kconfig. Unfortunately this is in the tree for quite a long time
that's why solution is to use imply DM for all targets which are
enabling DM.

Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Reviewed-by: Tom Rini <trini@konsulko.com>
Reviewed-by: Joe Hershberger <joe.hershberger@ni.com>
diff --git a/arch/arm/mach-imx/mx7/Kconfig b/arch/arm/mach-imx/mx7/Kconfig
index 60783ab..1acd7f3 100644
--- a/arch/arm/mach-imx/mx7/Kconfig
+++ b/arch/arm/mach-imx/mx7/Kconfig
@@ -26,6 +26,7 @@
 	select DM_THERMAL
 	select MX7D
 	select SUPPORT_SPL
+	imply CMD_DM
 
 config TARGET_MX7DSABRESD
 	bool "mx7dsabresd"
@@ -33,6 +34,7 @@
 	select DM
 	select DM_THERMAL
 	select MX7D
+	imply CMD_DM
 
 config TARGET_PICO_IMX7D
 	bool "pico-imx7d"
@@ -48,12 +50,15 @@
 	select DM
 	select DM_THERMAL
 	select MX7D
+	imply CMD_DM
+	imply CMD_DM
 
 config TARGET_COLIBRI_IMX7
 	bool "Support Colibri iMX7S/iMX7D modules"
 	select DM
 	select DM_SERIAL
 	select DM_THERMAL
+	imply CMD_DM
 
 endchoice