dm: exynos: Move driver model CONFIGs to Kconfig

Remove driver model CONFIGs from the board config headers and use Kconfig
instead.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/board/samsung/goni/Kconfig b/board/samsung/goni/Kconfig
index cbbf5a9..2c5d3fc 100644
--- a/board/samsung/goni/Kconfig
+++ b/board/samsung/goni/Kconfig
@@ -12,4 +12,13 @@
 config SYS_CONFIG_NAME
 	default "s5p_goni"
 
+config DM
+	default y if !SPL_BUILD
+
+config DM_GPIO
+	default y if !SPL_BUILD
+
+config DM_SERIAL
+	default y if !SPL_BUILD
+
 endif
diff --git a/board/samsung/smdk5420/Kconfig b/board/samsung/smdk5420/Kconfig
index a9d62ff..576abae 100644
--- a/board/samsung/smdk5420/Kconfig
+++ b/board/samsung/smdk5420/Kconfig
@@ -22,6 +22,9 @@
 config SYS_CONFIG_NAME
 	default "peach-pi"
 
+config DM_CROS_EC
+	default y
+
 endif
 
 if TARGET_PEACH_PIT
@@ -35,6 +38,9 @@
 config SYS_CONFIG_NAME
 	default "peach-pit"
 
+config DM_CROS_EC
+	default y
+
 endif
 
 if TARGET_SMDK5420
diff --git a/board/samsung/smdkc100/Kconfig b/board/samsung/smdkc100/Kconfig
index d2157b4..996fe3c 100644
--- a/board/samsung/smdkc100/Kconfig
+++ b/board/samsung/smdkc100/Kconfig
@@ -12,4 +12,13 @@
 config SYS_CONFIG_NAME
 	default "smdkc100"
 
+config DM
+	default y if !SPL_BUILD
+
+config DM_GPIO
+	default y if !SPL_BUILD
+
+config DM_SERIAL
+	default y if !SPL_BUILD
+
 endif