set_lladdr: use networking API net_addr_ll_set() on Linux

set_lladdr: use networking API net_addr_ll_set() on Linux

Make sure that set_addr() uses the proper networking backend when
setting the LL address of a TAP interface.

This operation was overlooked while implementing the networking APIs on
the Linux platform.

Reported-by: Jan Hugo Prins <jprins@betterbe.com>
Signed-off-by: Antonio Quartulli <a@unstable.cc>
Tested-by: Jan Hugo Prins <jprins@betterbe.com>
Acked-by: Gert Doering <gert@greenie.muc.de>
Message-Id: <20210903161113.30498-2-a@unstable.cc>
URL: https://www.mail-archive.com/openvpn-devel@lists.sourceforge.net/msg22791.html
Signed-off-by: Gert Doering <gert@greenie.muc.de>