UBIFS: support splice_write

Signed-off-by: Zoltan Sogor <weth@inf.u-szeged.hu>
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
diff --git a/fs/ubifs/file.c b/fs/ubifs/file.c
index 9fecab2..4071d1c 100644
--- a/fs/ubifs/file.c
+++ b/fs/ubifs/file.c
@@ -1271,6 +1271,7 @@
 	.fsync          = ubifs_fsync,
 	.unlocked_ioctl = ubifs_ioctl,
 	.splice_read	= generic_file_splice_read,
+	.splice_write	= generic_file_splice_write,
 #ifdef CONFIG_COMPAT
 	.compat_ioctl   = ubifs_compat_ioctl,
 #endif