IB/mlx5: Fix check of number of entries in create CQ
IB/mlx5: Fix check of number of entries in create CQ

Verify that the value is non negative before rounding up to power of 2.

Signed-off-by: Eli Cohen <3ca62a2ad87376be2697209a1770e1afdbbba220@mellanox.com>
Signed-off-by: Roland Dreier <0d270388f2f92757a5de0f4bd891d3b392c44c4f@purestorage.com>

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs