[PATCH] nfsroot port= parameter fix [backport of 2.4 fix]

Direct backport of 2.4 fix that didn't get propagated to 2.6; original
comment follows:
<quote>
   When I specify the NFS port for nfsroot (e.g.,
   nfsroot=<dir>,port=2049), the
   kernel uses the wrong port. In my case it tries to use 264 (0x108)
   instead
   of 2049 (0x801).

   This patch adds the missing htons().

   Eric
</quote>

Patch got applied in 2.4.21-pre6.  Author: Eric Lammerts (<eric@lammerts.org>,
AFAICS).

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