hwc: add support of HWC API

hwc: add support of HWC API

      add handlers of callback function:
       - sprd_output_hwc_window_create;
       - sprd_output_hwc_window_destroy;
       - sprd_output_validate;
       - sprd_output_get_changed_composition_types;
       - sprd_output_accept_changes;
       - sprd_output_get_target_surface_queue;
       - sprd_output_set_client_target_buffer;

       - sprd_hwc_window_get_tbm_surface_queue;
       - sprd_hwc_window_set_buffer;
       - sprd_hwc_window_set_composition_type;
       - sprd_hwc_window_set_info;
       - sprd_hwc_window_set_surface_damage;
       - sprd_hwc_window_set_zpos;

Change-Id: I6d8892ea2fe416fe5e306cb526a610a738289d40
Signed-off-by: Roman Marchenko <r.marchenko@samsung.com>