MFC	r196332: Apply the same patch as r196205 for nfs_upgrade_lock() and nfs_downgrade_lock() to the experimental nfs client.
MFC	r196332:
Apply the same patch as r196205 for nfs_upgrade_lock() and
nfs_downgrade_lock() to the experimental nfs client.

Approved by:	re (kensmith), kib (mentor)

jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase