NFS: Use proper naming conventions for the nfs_client.net field

Clean up:  When naming fields and data types, follow established
conventions to facilitate accurate grep/cscope searches.

Introduced by commit e50a7a1a "NFS: make NFS client allocated per
network namespace context," Tue Jan 10, 2012.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
diff --git a/include/linux/nfs_fs_sb.h b/include/linux/nfs_fs_sb.h
index 773e021..59410b3 100644
--- a/include/linux/nfs_fs_sb.h
+++ b/include/linux/nfs_fs_sb.h
@@ -88,7 +88,7 @@
 	struct fscache_cookie	*fscache;	/* client index cache cookie */
 #endif
 
-	struct net		*net;
+	struct net		*cl_net;
 };
 
 /*