arm: at91: taurus/axm: add DM and DTS support

add DM and DTS support for the at91 based siemens
boards.

Signed-off-by: Heiko Schocher <hs@denx.de>
Reviewed-by: Andreas Bießmann <andreas@biessmann.org>
[rebased on current ToT]
Signed-off-by: Andreas Bießmann <andreas@biessmann.org>
diff --git a/arch/arm/mach-at91/Kconfig b/arch/arm/mach-at91/Kconfig
index 3adfe7e..13e19ba 100644
--- a/arch/arm/mach-at91/Kconfig
+++ b/arch/arm/mach-at91/Kconfig
@@ -131,6 +131,10 @@
 	bool "Support taurus"
 	select CPU_ARM926EJS
 	select SUPPORT_SPL
+	select DM
+	select DM_SERIAL
+	select DM_GPIO
+	select DM_ETH
 
 config TARGET_SMARTWEB
 	bool "Support smartweb"