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-meson/Kconfig b/arch/arm/mach-meson/Kconfig
index 7662256..ee8b1cd 100644
--- a/arch/arm/mach-meson/Kconfig
+++ b/arch/arm/mach-meson/Kconfig
@@ -6,6 +6,7 @@
 	select CLK
 	select DM
 	select DM_SERIAL
+	imply CMD_DM
 	help
 	  The Amlogic Meson GXBaby (S905) is an ARM SoC with a
 	  quad-core Cortex-A53 CPU and a Mali-450 GPU.
@@ -16,6 +17,7 @@
 	select CLK
 	select DM
 	select DM_SERIAL
+	imply CMD_DM
 	help
 	  The Amlogic Meson GXL (S905X and S905D) is an ARM SoC with a
 	  quad-core Cortex-A53 CPU and a Mali-450 GPU.