Staging: lustre: Fix initialisation of statics to 0 or NULL

This patch fixes the following checkpatch.pl issues in lnet/lnet/acceptor.c:
ERROR: do not initialise statics to 0 or NULL
Signed-off-by: Rashika Kheria <rashika.kheria@gmail.com>
Reviewed-by: Lisa Nguyen <lisa@xenapiadmin.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/lustre/lnet/lnet/acceptor.c

@@ -73,7 +73,7 @@ CFS_MODULE_PARM(accept_backlog, "i", int, 0444,
 CFS_MODULE_PARM(accept_timeout, "i", int, 0644,
 		"Acceptor's timeout (seconds)");
 
-static char *accept_type = NULL;
+static char *accept_type;
 
 int
 lnet_acceptor_get_tunables(void)