net/mlx5: introduce thread safe linked list cache

net/mlx5: introduce thread safe linked list cache

New API of linked list for cache:
- Optimized for small amount cache list.
- Optimized for read-most list.
- Thread safe.
- Since number of entries are limited, entries allocated by API.
- For dynamic entry size, pass 0 as entry size, then the creation
callback allocate the entry.
- Since number of entries are limited, no need to use indexed pool to
allocate memory. API will remove entry and free with mlx5_free.
- Search API is not supposed to be used in multi-thread.

Signed-off-by: Xueming Li <xuemingl@nvidia.com>
Acked-by: Matan Azrad <matan@nvidia.com>