kbuild: trivial - use tabs for code indent where possible

Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
Signed-off-by: Michal Marek <mmarek@suse.cz>
diff --git a/scripts/kconfig/zconf.lex.c_shipped b/scripts/kconfig/zconf.lex.c_shipped
index a0521aa..349a7f2 100644
--- a/scripts/kconfig/zconf.lex.c_shipped
+++ b/scripts/kconfig/zconf.lex.c_shipped
@@ -789,8 +789,8 @@
 static int text_size, text_asize;
 
 struct buffer {
-        struct buffer *parent;
-        YY_BUFFER_STATE state;
+	struct buffer *parent;
+	YY_BUFFER_STATE state;
 };
 
 struct buffer *current_buf;