batman-adv: send GW_DEL event in case of soft-iface destruction
batman-adv: send GW_DEL event in case of soft-iface destruction

In case of soft_iface destruction send a GW DEL event to
userspace so that applications which are listening for GW
events are informed about the lost of connectivity and can
react accordingly.

Signed-off-by: Antonio Quartulli <a08f08bac39aeae6c9580ade7aa8387b5a0e7428@open-mesh.com>
Signed-off-by: Marek Lindner <5760fd64db566c47bfb7ce809fea1d3e512880cf@neomailbox.ch>

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs