davinci: da850-evm: switch to using TI_COMMON_CMD_OPTIONS

Like the OMAP-L138 LCDK before it, let's move the da850-evm and
the variations to TI_COMMON_CMD_OPTIONS to cut back one some of the
defconfig entries.

Signed-off-by: Adam Ford <aford173@gmail.com>
diff --git a/board/davinci/da8xxevm/Kconfig b/board/davinci/da8xxevm/Kconfig
index 0935abf..d49d244 100644
--- a/board/davinci/da8xxevm/Kconfig
+++ b/board/davinci/da8xxevm/Kconfig
@@ -22,6 +22,6 @@
 config SYS_CONFIG_NAME
 	default "omapl138_lcdk"
 
-source "board/ti/common/Kconfig"
-
 endif
+
+source "board/ti/common/Kconfig"