net/mlx5: rearrange creation of RQ and CQ resources

net/mlx5: rearrange creation of RQ and CQ resources

Rearrangement of RQ and CQ resource handling for DevX Rx queue:
1. Rename the allocation function so that it is understood that it
allocates all resources and not just the CQ or RQ.
2. Move the allocation and release of the doorbell into creation and
release functions.
3. Reduce the number of arguments that the creation functions receive.

Signed-off-by: Michael Baum <michaelba@nvidia.com>
Acked-by: Matan Azrad <matan@nvidia.com>