NFSv4.1: Always clear the NFS_INO_LAYOUTCOMMIT in layoutreturn

NFSv4.1: Always clear the NFS_INO_LAYOUTCOMMIT in layoutreturn

commit 24956804349ca0eadcdde032d65e8c00b4214096 upstream.

Note that clearing NFS_INO_LAYOUTCOMMIT is tricky, since it requires
you to also clear the NFS_LSEG_LAYOUTCOMMIT bits from the layout
segments.
The only two sites that need to do this are the ones that call
pnfs_return_layout() without first doing a layout commit.

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Acked-by: Benny Halevy <bhalevy@tonian.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>