compress/mlx5: add memory region management

compress/mlx5: add memory region management

Mellanox user space drivers don't deal with physical addresses, that's
why any mbuf virtual address moved directly to the HW descriptor(WQE).

The mapping between the virtual address to the physical address is saved
in MR configured by the kernel to the HW.

Each MR has a key that should also be moved to the WQE by the SW.

When the SW see address which is not mapped, it extends the address
range and creates a MR using a system call.

Add memory region cache management:
	- 2 level cache per queue-pair - no locks.
	- 1 shared cache between all the queues using a lock.

Using this way, the MR key search per data-path address is optimized.

Signed-off-by: Matan Azrad <matan@nvidia.com>
Acked-by: Viacheslav Ovsiienko <viacheslavo@nvidia.com>