staging: lustre: lustre: ptlrpc: Donot initialise null

This patch fixes the following error using checkpatch.pl
Error: Do not initialise statics to 0 or NULL
Signed-off-by: Hema Prathaban <hemaklnce@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/lustre/lustre/ptlrpc/connection.c

@@ -41,7 +41,7 @@
 
 #include "ptlrpc_internal.h"
 
-static struct cfs_hash *conn_hash = NULL;
+static struct cfs_hash *conn_hash;
 static cfs_hash_ops_t conn_hash_ops;
 
 struct ptlrpc_connection *