arm: da850-evm: Enable DM and device tree support for da850-evm

With the device tree ported and DM compatible drivers, enable:
OF_CONTROL, DM_SPI, DM_SPI_FLASH and DM_SERIAL

Note: DM_SERIAL is not enabled for da850evm_direct_nor_defconfig
yet.

Reviewed-by: Jagan Teki <jagan@openedev.com>
Signed-off-by: Adam Ford <aford173@gmail.com>
diff --git a/board/davinci/da8xxevm/Kconfig b/board/davinci/da8xxevm/Kconfig
index bb1188b..e0df97c 100644
--- a/board/davinci/da8xxevm/Kconfig
+++ b/board/davinci/da8xxevm/Kconfig
@@ -33,6 +33,8 @@
 
 endif
 
+source "board/ti/common/Kconfig"
+
 endif
 
 if TARGET_OMAPL138_LCDK