RDMA/cm: Remove useless zeroing of static global variable

Static global variables are initialized to zero by C standard,
there is no need to zero them again.
Signed-off-by: NLeon Romanovsky <leonro@mellanox.com>
Signed-off-by: NJason Gunthorpe <jgg@mellanox.com>

drivers/infiniband/core/cm.c

@@ -4498,7 +4498,6 @@ static int __init ib_cm_init(void)
 {
 	int ret;
 
-	memset(&cm, 0, sizeof cm);
 	INIT_LIST_HEAD(&cm.device_list);
 	rwlock_init(&cm.device_lock);
 	spin_lock_init(&cm.lock);