linux-imx

IB/mlx5: Handle raw delay drop general event

Handle FW general event rq delay drop as it was received from FW via mlx5
notifiers API, instead of handling the processed software version of that
event. After this patch we can safely remove all software processed FW
events types and definitions.

Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>