tools: moveconfig: do not check clean tree and compilers for -H option

The clean tree (make mrproper) and compilers are required when moving
config options, but not needed when we only cleanup headers.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Reviewed-by: Tom Rini <trini@konsulko.com>
diff --git a/tools/moveconfig.py b/tools/moveconfig.py
index fff44b2..1741e68 100755
--- a/tools/moveconfig.py
+++ b/tools/moveconfig.py
@@ -1042,11 +1042,9 @@
 
     check_top_directory()
 
-    check_clean_directory()
-
-    update_cross_compile(options.color)
-
     if not options.cleanup_headers_only:
+        check_clean_directory()
+        update_cross_compile(options.color)
         move_config(configs, options)
 
     if configs: