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/microblaze/Kconfig b/arch/microblaze/Kconfig
index 1df1ecf..5cc68d6 100644
--- a/arch/microblaze/Kconfig
+++ b/arch/microblaze/Kconfig
@@ -16,6 +16,7 @@
 	select OF_CONTROL
 	select SUPPORT_SPL
 	select SYSRESET
+	imply CMD_DM
 
 endchoice