kconfig: move CONFIG_CMD_IMPORTENV to Kconfig

Since CONFIG_CMD_IMPORTENV is defined in config_cmd_defaults.h,
it should be enabled for all the boards except bf506f-ezkit
that undefs it explicitely.
Signed-off-by: NMasahiro Yamada <yamada.m@jp.panasonic.com>
Acked-by: NSimon Glass <sjg@chromium.org>
Tested-by: NSimon Glass <sjg@chromium.org>

common/Kconfig

@@ -19,6 +19,12 @@ config CMD_EXPORTENV
 	help
 	  Export environments.
 
+config CMD_IMPORTENV
+	bool "Enable env import command"
+	default y
+	help
+	  Import environments.
+
 config CMD_GO
 	bool "Enable go command"
 	default y

configs/bf506f-ezkit_defconfig

@@ -2,3 +2,4 @@ CONFIG_BLACKFIN=y
 CONFIG_TARGET_BF506F_EZKIT=y
 # CONFIG_CMD_BOOTM is not set
 # CONFIG_CMD_EXPORTENV is not set
+# CONFIG_CMD_IMPORTENV is not set

include/config_cmd_defaults.h

@@ -9,6 +9,5 @@
 #ifndef _CONFIG_CMD_DEFAULTS_H_
 #define _CONFIG_CMD_DEFAULTS_H_
 
-#define CONFIG_CMD_IMPORTENV 1
 
 #endif

include/configs/bf506f-ezkit.h

@@ -85,7 +85,6 @@
  */
 #define CONFIG_ENV_IS_NOWHERE
 #define CONFIG_ENV_SIZE 0x400
-#undef CONFIG_CMD_IMPORTENV
 
 
 /*

include/configs/h2200.h

@@ -116,7 +116,6 @@
 #define CONFIG_BAUDRATE			115200
 #define CONFIG_SYS_BAUDRATE_TABLE	{ 9600, 38400, 115200 }
 
-#define CONFIG_CMD_IMPORTENV		1
 #define CONFIG_CMD_LOADB
 #define CONFIG_CMD_SOURCE
 #define CONFIG_CMD_RUN