net: l2: openthread: openthread_border_router: Update address events

This commit refactored IPV6 and IPV4 address events. Events have been
defined independently for each installed callback.
Previously, IPV6 address event was not triggered due to a mix of IPV4
and IPV6 flags.

Signed-off-by: Cristian Bulacu <cristian.bulacu@nxp.com>
1 file changed