kconfig: move CONFIG_CMD_GO to Kconfig

Since CONFIG_CMD_GO is defined in config_cmd_defaults.h
(and no board undefs it its own header), it can be moved to
Kconfig with the default value "y".
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

@@ -19,4 +19,10 @@ config CMD_EXPORTENV
 	help
 	  Export environments.
 
+config CMD_GO
+	bool "Enable go command"
+	default y
+	help
+	  Start an application at a given address.
+
 endmenu

include/config_cmd_defaults.h

@@ -9,7 +9,6 @@
 #ifndef _CONFIG_CMD_DEFAULTS_H_
 #define _CONFIG_CMD_DEFAULTS_H_
 
-#define CONFIG_CMD_GO 1
 #define CONFIG_CMD_IMPORTENV 1
 
 #endif