kconfig: do not define AUTOCONF_INCLUDED

AUTOCONF_INCLUDED is not checked is not used within the tree and its parent
header, `autoconf.h', is safe to be re-included.

Signed-off-by: Arnaud Lacombe <lacombar@gmail.com>
Signed-off-by: Michal Marek <mmarek@suse.cz>
diff --git a/scripts/kconfig/confdata.c b/scripts/kconfig/confdata.c
index 9df8011..f349bdc 100644
--- a/scripts/kconfig/confdata.c
+++ b/scripts/kconfig/confdata.c
@@ -833,8 +833,7 @@
 		       " * Automatically generated C config: don't edit\n"
 		       " * %s\n"
 		       " * %s"
-		       " */\n"
-		       "#define AUTOCONF_INCLUDED\n",
+		       " */\n",
 		       rootmenu.prompt->text, ctime(&now));
 
 	for_all_symbols(i, sym) {