net/mlx5: Refactor completion IRQ request/release handlers in EQ layer

Break the completion IRQ request/release functions into per-vector
handlers for both PCI devices and SFs in the EQ layer.

On EQ table creation, loop over all vectors and request an IRQ for each
one using the new per-vector functions. Perform the symmetrical change
when releasing IRQs on EQ table cleanup.

Signed-off-by: Maher Sanalla <msanalla@nvidia.com>
Reviewed-by: Shay Drory <shayd@nvidia.com>
Reviewed-by: Moshe Shemesh <moshe@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>