9p: kerneldoc warning fixes

options argument was removed from v9fs_session_info in commit 4b53e4b500
("9p: remove unnecessary v9fses->options which duplicates the mount string")

iov and nr_segs were removed from v9fs_direct_IO
in commit d8d3d94b80
("pass iov_iter to ->direct_IO()")

Cc: Eric Van Hensbergen <ericvh@gmail.com>
Cc: Ron Minnich <rminnich@sandia.gov>
Cc: Latchesar Ionkov <lucho@ionkov.net>
Cc: v9fs-developer@lists.sourceforge.net
Signed-off-by: Fabian Frederick <fabf@skynet.be>
Signed-off-by: Dominique Martinet <dominique.martinet@cea.fr>
Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>

fs/9p/vfs_addr.c

@@ -243,9 +243,7 @@ static int v9fs_launder_page(struct page *page)
  * v9fs_direct_IO - 9P address space operation for direct I/O
  * @rw: direction (read or write)
  * @iocb: target I/O control block
- * @iov: array of vectors that define I/O buffer
  * @pos: offset in file to begin the operation
- * @nr_segs: size of iovec array
  *
  * The presence of v9fs_direct_IO() in the address space ops vector
  * allowes open() O_DIRECT flags which would have failed otherwise.