net/mlx5: Loop over temp list to release delay events

list_splice_init initializing waiting_events_list after splicing it to
temp list, therefore we should loop over temp list to fire the events.

Fixes: 4ca637a2

 ("net/mlx5: Delay events till mlx5 interface's add complete for pci resume")
Signed-off-by: Huy Nguyen <huyn@mellanox.com>
Signed-off-by: Feras Daoud <ferasda@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>