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: Masahiro Yamada <yamada.m@jp.panasonic.com>
Acked-by: Simon Glass <sjg@chromium.org>
Tested-by: Simon Glass <sjg@chromium.org>
diff --git a/common/Kconfig b/common/Kconfig
index f628315..7875e5e 100644
--- a/common/Kconfig
+++ b/common/Kconfig
@@ -19,4 +19,10 @@
 	help
 	  Export environments.
 
+config CMD_GO
+	bool "Enable go command"
+	default y
+	help
+	  Start an application at a given address.
+
 endmenu