at91: ma5d4evk: Enable DM_SPI

AT91 ma5d4evk board uses atmel spi driver, enable DM_SPI to
use dm functionality.

Kept few functions related to non-dm and gpio on board
files for reference and will be remove once code moved
to relevant drivers.

Signed-off-by: Jagan Teki <jagan@amarulasolutions.com>
diff --git a/arch/arm/mach-at91/Kconfig b/arch/arm/mach-at91/Kconfig
index 4dfddcc..3621dfa 100644
--- a/arch/arm/mach-at91/Kconfig
+++ b/arch/arm/mach-at91/Kconfig
@@ -201,6 +201,7 @@
 	select SAMA5D4
 	select SUPPORT_SPL
 	select DM
+	select DM_SPI
 
 config TARGET_MEESC
 	bool "Support meesc"