NFS: Fix /proc/mount for legacy binary interface

Add a flag so we know if we mounted the NFS server using the legacy
binary interface.  If we used the legacy interface, then we should not
show the mountd options.

Signed-off-by: Bryan Schumaker <bjschuma@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
diff --git a/include/linux/nfs_mount.h b/include/linux/nfs_mount.h
index 4499016..5d59ae8 100644
--- a/include/linux/nfs_mount.h
+++ b/include/linux/nfs_mount.h
@@ -69,5 +69,6 @@
 #define NFS_MOUNT_LOOKUP_CACHE_NONEG	0x10000
 #define NFS_MOUNT_LOOKUP_CACHE_NONE	0x20000
 #define NFS_MOUNT_NORESVPORT		0x40000
+#define NFS_MOUNT_LEGACY_INTERFACE	0x80000
 
 #endif