NFS: Deindent nfs_fs_context_parse_option()

Deindent nfs_fs_context_parse_option().
Signed-off-by: NDavid Howells <dhowells@redhat.com>
Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>
Signed-off-by: NAnna Schumaker <Anna.Schumaker@Netapp.com>