cmd: fdt: Use separate CMD_FDT Kconfig entry instead of OF_LIBFDT

Create CMD_FDT Kconfig entry to have an option to disable fdt command
which is not required for small configuration which requires libfdt
only.
Enable it by default for all targets which enables OF_LIBFDT.

Signed-off-by: Michal Simek <michal.simek@xilinx.com>
[trini: Fixup flea3/sandbox/id8313/siemens-am33xx/smartweb]
Signed-off-by: Tom Rini <trini@konsulko.com>

cmd/Kconfig

@@ -173,6 +173,13 @@ config CMD_ELF
 	help
 	  Boot an ELF/vxWorks image from the memory.
 
+config CMD_FDT
+	bool "Flattened Device Tree utility commands"
+	default y
+	depends on OF_LIBFDT
+	help
+	  Do FDT related setup before booting into the Operating System.
+
 config CMD_GO
 	bool "go"
 	default y

cmd/Makefile

@@ -54,7 +54,7 @@ obj-$(CONFIG_CMD_EXT4) += ext4.o
 obj-$(CONFIG_CMD_EXT2) += ext2.o
 obj-$(CONFIG_CMD_FAT) += fat.o
 obj-$(CONFIG_CMD_FDC) += fdc.o
-obj-$(CONFIG_OF_LIBFDT) += fdt.o
+obj-$(CONFIG_CMD_FDT) += fdt.o
 obj-$(CONFIG_CMD_FITUPD) += fitupd.o
 obj-$(CONFIG_CMD_FLASH) += flash.o
 ifdef CONFIG_FPGA

include/configs/flea3.h

@@ -250,7 +250,4 @@
 		"else echo U-Boot not downloaded..exiting;fi\0"		\
 	"bootcmd=run net_nfs\0"
 
-/* Enable FIT images support */
-#define CONFIG_CMD_FDT
-
 #endif				/* __CONFIG_H */

include/configs/ids8313.h

@@ -559,7 +559,6 @@
 #define CONFIG_VERSION_VARIABLE
 
 #define CONFIG_IMAGE_FORMAT_LEGACY
-#define CONFIG_CMD_FDT
 #define CONFIG_CMD_HASH
 #define CONFIG_SHA1
 #define CONFIG_SHA256

include/configs/sandbox.h

@@ -29,7 +29,6 @@
 #define CONFIG_SANDBOX_BITS_PER_LONG	64
 
 #define CONFIG_LMB
-#define CONFIG_CMD_FDT
 #define CONFIG_ANDROID_BOOT_IMAGE
 
 #define CONFIG_CMD_PCI

include/configs/siemens-am33x-common.h

@@ -623,7 +623,4 @@
 #define CONFIG_BOOTCOUNT_LIMIT
 #define CONFIG_BOOTCOUNT_ENV
 
-/* Enable Device-Tree (FDT) support */
-#define CONFIG_CMD_FDT
-
 #endif	/* ! __CONFIG_SIEMENS_AM33X_COMMON_H */

include/configs/smartweb.h

@@ -240,8 +240,6 @@
 # undef CONFIG_CMD_NFS
 #endif /* CONFIG_MACB */
 
-#define CONFIG_CMD_FDT
-
 #ifdef CONFIG_SPL_BUILD
 #define CONFIG_SYS_INIT_SP_ADDR		0x301000
 #define CONFIG_SPL_STACK_R