btrfs: add SPDX header to Kconfig

Signed-off-by: David Sterba <dsterba@suse.com>
2018-04-03 19:23:33 +02:00 · 2018-04-03 19:23:33 +02:00 · 852eb3aeea
--- a/fs/btrfs/Kconfig
+++ b/fs/btrfs/Kconfig
@ -1,3 +1,5 @@
+# SPDX-License-Identifier: GPL-2.0
+
 config BTRFS_FS
 	tristate "Btrfs filesystem support"
 	select LIBCRC32C