- Added required logic to provide correct L2 netstats when the module netstats_l2 is used. - Refactored code to use gnrc_netif_hdr_set_netif() over manually setting the pid to ease future refactoring.
Removing usage of netdev->stats in all net drivers, as it is handled by gnrc_netif.
This adaption layer is intended to be used by a rewrite of the CC110x driver and a new CC1200 driver that is currently being developed for RIOT.
