net: ieee802154: stop dump llsec devs for monitors

net: ieee802154: stop dump llsec devs for monitors

BugLink: https://bugs.launchpad.net/bugs/1926999
[ Upstream commit 5582d641e6740839c9b83efd1fbf9bcd00b6f5fc ]

This patch stops dumping llsec devs for monitors which we don't support
yet. Otherwise we will access llsec mib which isn't initialized for
monitors.

Signed-off-by: Alexander Aring <aahringo@redhat.com>
Link: https://lore.kernel.org/r/20210405003054.256017-7-aahringo@redhat.com
Signed-off-by: Stefan Schmidt <stefan@datenfreihafen.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Kamal Mostafa <kamal@canonical.com>
Signed-off-by: Stefan Bader <stefan.bader@canonical.com>