nfs: do not initialise statics to 0

This patch fixes the checkpatch.pl error to nfs4sysctl.c:

ERROR: do not initialise statics to 0

Signed-off-by: Wei Tang <tangwei@cmss.chinamobile.com>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
diff --git a/fs/nfs/nfs4sysctl.c b/fs/nfs/nfs4sysctl.c
index 0fbd3ab..8693d77 100644
--- a/fs/nfs/nfs4sysctl.c
+++ b/fs/nfs/nfs4sysctl.c
@@ -12,7 +12,7 @@
 #include "nfs4idmap.h"
 #include "callback.h"
 
-static const int nfs_set_port_min = 0;
+static const int nfs_set_port_min;
 static const int nfs_set_port_max = 65535;
 static struct ctl_table_header *nfs4_callback_sysctl_table;