arm: at91: smartweb: add DM and DTS support

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 0ff0d1d..3adfe7e 100644
--- a/arch/arm/mach-at91/Kconfig
+++ b/arch/arm/mach-at91/Kconfig
@@ -136,6 +136,10 @@
 	bool "Support smartweb"
 	select CPU_ARM926EJS
 	select SUPPORT_SPL
+	select DM
+	select DM_SERIAL
+	select DM_GPIO
+	select DM_ETH
 
 config TARGET_VINCO
 	bool "Support VINCO"