NFS: cleanup endian type in decode_ds_addr()

port is supposed to be a __be16 here.  The existing code should work
fine, but this is a cleanup.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
diff --git a/fs/nfs/nfs4filelayoutdev.c b/fs/nfs/nfs4filelayoutdev.c
index ed388aa..8ae9190 100644
--- a/fs/nfs/nfs4filelayoutdev.c
+++ b/fs/nfs/nfs4filelayoutdev.c
@@ -382,7 +382,7 @@
 {
 	struct nfs4_pnfs_ds_addr *da = NULL;
 	char *buf, *portstr;
-	u32 port;
+	__be16 port;
 	int nlen, rlen;
 	int tmp[2];
 	__be32 *p;