fix broken handling of port=... in NFS option parsing

Obviously broken on little-endian; fortunately, the option is not
frequently used...

Signed-off-by: Al Viro <[e-mail]>
[ Hey, sparse is wonderful, but even better than sparse is having people
like Al that actually _run_ it and fix bugs using it. - Linus ]
Signed-off-by: Linus Torvalds <[e-mail]>

fs/nfs/super.c

···
 				return 0;
 			if (option < 0 || option > 65535)
 				return 0;
-			mnt->nfs_server.address.sin_port = htonl(option);
+			mnt->nfs_server.address.sin_port = htons(option);
 			break;
 		case Opt_rsize:
 			if (match_int(args, &mnt->rsize))