nfs4_closedata doesn't need to mess with struct path

instead of path_get()/path_put(), we can just use nfs_sb_{,de}active()
to pin the superblock down.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

diff --cc fs/nfs/nfs4_fs.h
Simple merge

diff --cc fs/nfs/nfs4proc.c
Simple merge

diff --cc fs/nfs/nfs4state.c
Simple merge