RIOT-OS/RIOT — pull request #1774 by authmillenon (2014-10-07 15:41:29+00:00)
Title: netdev: Provide maximum value of netdev_opt_t for further definitions

This simple addition allows for related definitions (e.g. `netapi_conf_type_t`) to easily find out, what the maximum possible value of `netdev_opt_t` is, even if this changes in the future.