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/tags.sh b/scripts/tags.sh
index 4c425d2..e6b011f 100755
--- a/scripts/tags.sh
+++ b/scripts/tags.sh
@@ -281,7 +281,7 @@
 		emacs $1
 	else
 		all_target_sources | xargs $1 -a
-        fi
+	fi
 }
 
 # Support um (which uses SUBARCH)