sif: cq: Add additional SIF visible cqes to CQ

sif: cq: Add additional SIF visible cqes to CQ

Orabug: 24673784

Due to two HW bugs, SIF needs to add additional cqes apart from
the requested N cqes. First issue is that the CQ cannot be full
when it is being invalidated. Hence, we need 1 extra entry.

The second issue is that HW might generate duplicate completions.
Thus, SIF needs 768 extra entries to cater for these duplicate
completions and 1 additional entry for the fence completion.

Then, SIF driver rounds up to the nearest 2^N. The number of cqes
available to the ulp/user, will be the above 2^N - (768 + 1 + 1).

Signed-off-by: Wei Lin Guay <wei.lin.guay@oracle.com>
Reviewed-by: Håkon Bugge <haakon.bugge@oracle.com>