qed: Correct out-of-bound access in OOO history

Need to set the number of entries in database, otherwise the logic
would quickly surpass the array.

Fixes: 1d6cff4f

 ("qed: Add iSCSI out of order packet handling")
Signed-off-by: Yuval Mintz <Yuval.Mintz@cavium.com>
Signed-off-by: David S. Miller <davem@davemloft.net>