common/mlx5: add glue functions on Windows

common/mlx5: add glue functions on Windows

Windows glue functions are added to file mlx5/windows/mlx5_glue.c.
The following APIs are supported:
get_device_list, free_device_list, open_device, close_device,
query_device, query_hca_iseg, devx_obj_create, devx_obj_destroy,
devx_obj_query, devx_obj_modify, devx_general_cmd, devx_umem_reg,
devx_umem_dereg, devx_alloc_uar, devx_free_uar, devx_fs_rule_add,
devx_fs_rule_del, devx_query_eqn
New added files:
mlx5_win_defs.h - this file imports missing definitions from Linux
rdma-core library and Linux OS.
mlx5_win_ext.h - this file contains structs that enable a unified
Linux/Windows API. Each struct has an equivalent (but different) Linux
struct. By calling with 'void *' pointers - the Linux/Windows API is
identical.

Signed-off-by: Tal Shnaiderman <talshn@nvidia.com>
Acked-by: Matan Azrad <matan@nvidia.com>