oeqa/utils/nfs: allow requesting non-udp ports

Allows setting up NFS over TCP as well.

Signed-off-by: Anuj Mittal <anuj.mittal@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
(cherry picked from commit e1ff9b9a)
Signed-off-by: Steve Sakoman <steve@sakoman.com>