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: Leon Romanovsky <[e-mail]>
Signed-off-by: Jason Gunthorpe <[e-mail]>

drivers/infiniband/core/cm.c

···
 {
 	int ret;
 
-	memset(&cm, 0, sizeof cm);
 	INIT_LIST_HEAD(&cm.device_list);
 	rwlock_init(&cm.device_lock);
 	spin_lock_init(&cm.lock);