make `go` optional

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
diff --git a/include/config_cmd_defaults.h b/include/config_cmd_defaults.h
index 6adebdb..79c0495 100644
--- a/include/config_cmd_defaults.h
+++ b/include/config_cmd_defaults.h
@@ -11,6 +11,7 @@
 
 #define CONFIG_CMD_BOOTM 1
 #define CONFIG_CMD_EXPORTENV 1
+#define CONFIG_CMD_GO 1
 #define CONFIG_CMD_IMPORTENV 1
 
 #endif