batman-adv: add generic netlink family for batman-adv

batman-adv: add generic netlink family for batman-adv

debugfs is currently severely broken virtually everywhere in the kernel
where files are dynamically added and removed (see
http://lkml.iu.edu/hypermail/linux/kernel/1506.1/02196.html for some
details). In addition to that, debugfs is not namespace-aware.

Instead of adding new debugfs entries, the whole infrastructure should be
moved to netlink. This will fix the long standing problem of large buffers
for debug tables and hard to parse text files.

Signed-off-by: Matthias Schiffer <[email protected]>
Signed-off-by: Andrew Lunn <[email protected]>
[[email protected]: Strip down patch to only add genl family,
add missing kerneldoc]
Signed-off-by: Sven Eckelmann <[email protected]>
Signed-off-by: Marek Lindner <[email protected]>
Signed-off-by: Simon Wunderlich <[email protected]>