RDMA/mana_ib: Process QP error events in mana_ib

Process QP fatal events from the error event queue.
For that, find the QP, using QPN from the event, and then call its
event_handler. To find the QPs, store created RC QPs in an xarray.

Signed-off-by: Konstantin Taranov <kotaranov@microsoft.com>
Link: https://lore.kernel.org/r/1717754897-19858-1-git-send-email-kotaranov@linux.microsoft.com


Reviewed-by: Wei Hu <weh@microsoft.com>
Signed-off-by: Leon Romanovsky <leon@kernel.org>