RDMA/irdma: Use CQ ID for CEQE context

The hardware allows for an opaque CQ context field to be carried
over into CEQEs for the CQ. Previously, a pointer to the CQ was used
for this context. In the normal CQ destroy flow, the CEQ ring is
scrubbed to remove any preexisting CEQEs for the CQ that may not have
been processed yet so that the CQ structure is not dereferenced in the
CEQ ISR after the CQ has been freed.

However, in some cases, it is possible for a CEQE to be in flight in
HW even after the CQ destroy command completion is received, so it
could be missed during the scrub.

To protect against this, we can take advantage of the CQ table that
already exists and use the CQ ID for this context rather than a CQ
pointer.

Signed-off-by: Jacob Moroni <jmoroni@google.com>
Link: https://patch.msgid.link/20260120212546.1893076-2-jmoroni@google.com
Signed-off-by: Leon Romanovsky <leon@kernel.org>

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