dm: omap3: 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/compulab/cm_t335/Kconfig b/board/compulab/cm_t335/Kconfig
index 683efde..aadbfbc 100644
--- a/board/compulab/cm_t335/Kconfig
+++ b/board/compulab/cm_t335/Kconfig
@@ -12,4 +12,13 @@
 config SYS_CONFIG_NAME
 	default "cm_t335"
 
+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/gumstix/pepper/Kconfig b/board/gumstix/pepper/Kconfig
index 6f94612..3099a9e 100644
--- a/board/gumstix/pepper/Kconfig
+++ b/board/gumstix/pepper/Kconfig
@@ -12,4 +12,13 @@
 config SYS_CONFIG_NAME
 	default "pepper"
 
+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/isee/igep0033/Kconfig b/board/isee/igep0033/Kconfig
index e989e4b..2fe2ef1 100644
--- a/board/isee/igep0033/Kconfig
+++ b/board/isee/igep0033/Kconfig
@@ -12,4 +12,13 @@
 config SYS_CONFIG_NAME
 	default "am335x_igep0033"
 
+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/phytec/pcm051/Kconfig b/board/phytec/pcm051/Kconfig
index 2cc0d88..65094cf 100644
--- a/board/phytec/pcm051/Kconfig
+++ b/board/phytec/pcm051/Kconfig
@@ -12,4 +12,13 @@
 config SYS_CONFIG_NAME
 	default "pcm051"
 
+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/silica/pengwyn/Kconfig b/board/silica/pengwyn/Kconfig
index f2e1098..6ecda80 100644
--- a/board/silica/pengwyn/Kconfig
+++ b/board/silica/pengwyn/Kconfig
@@ -12,4 +12,13 @@
 config SYS_CONFIG_NAME
 	default "pengwyn"
 
+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/ti/am335x/Kconfig b/board/ti/am335x/Kconfig
index 1ddbb2c..d6581ac 100644
--- a/board/ti/am335x/Kconfig
+++ b/board/ti/am335x/Kconfig
@@ -37,4 +37,14 @@
 	  booted via NOR.  In this case we will enable certain pinmux early
 	  as the ROM only partially sets up pinmux.  We also default to using
 	  NOR for environment.
+
+config DM
+	default y if !SPL_BUILD
+
+config DM_GPIO
+	default y if DM && !SPL_BUILD
+
+config DM_SERIAL
+	default y if DM && !SPL_BUILD
+
 endif