dm: mx6: sabre: 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>

configs/mx6dlsabreauto_defconfig

@@ -3,3 +3,5 @@ CONFIG_ARM=y
 CONFIG_TARGET_MX6QSABREAUTO=y
 CONFIG_SYS_MALLOC_F=y
 CONFIG_SYS_MALLOC_F_LEN=0x400
+CONFIG_DM=y
+CONFIG_DM_THERMAL=y

configs/mx6dlsabresd_defconfig

 CONFIG_SYS_EXTRA_OPTIONS="IMX_CONFIG=board/freescale/mx6sabresd/mx6dlsabresd.cfg,MX6DL"
 CONFIG_ARM=y
 CONFIG_TARGET_MX6SABRESD=y
+CONFIG_DM=y
+CONFIG_DM_THERMAL=y

configs/mx6qsabreauto_defconfig

@@ -3,3 +3,5 @@ CONFIG_ARM=y
 CONFIG_TARGET_MX6QSABREAUTO=y
 CONFIG_SYS_MALLOC_F=y
 CONFIG_SYS_MALLOC_F_LEN=0x400
+CONFIG_DM=y
+CONFIG_DM_THERMAL=y

configs/mx6qsabrelite_defconfig

 CONFIG_SYS_EXTRA_OPTIONS="IMX_CONFIG=board/boundary/nitrogen6x/nitrogen6q.cfg,MX6Q,DDR_MB=1024,SABRELITE"
 CONFIG_ARM=y
 CONFIG_TARGET_NITROGEN6X=y
+CONFIG_DM=y
+CONFIG_DM_THERMAL=y

configs/mx6qsabresd_defconfig

@@ -3,3 +3,5 @@ CONFIG_ARM=y
 CONFIG_TARGET_MX6SABRESD=y
 CONFIG_SYS_MALLOC_F=y
 CONFIG_SYS_MALLOC_F_LEN=0x400
+CONFIG_DM=y
+CONFIG_DM_THERMAL=y

configs/mx6sabresd_spl_defconfig

@@ -2,4 +2,5 @@ CONFIG_SPL=y
 CONFIG_SYS_EXTRA_OPTIONS="IMX_CONFIG=arch/arm/imx-common/spl_sd.cfg,SPL,MX6Q"
 +S:CONFIG_ARM=y
 +S:CONFIG_TARGET_MX6SABRESD=y
-
+CONFIG_DM=y
+CONFIG_DM_THERMAL=y

include/configs/mx6sabre_common.h

@@ -25,8 +25,6 @@
 #define CONFIG_INITRD_TAG
 #define CONFIG_REVISION_TAG
 
-#define CONFIG_DM
-#define CONFIG_DM_THERMAL
 #define CONFIG_IMX6_THERMAL
 
 #define CONFIG_SYS_GENERIC_BOARD