net: ieee802154: stop dump llsec params for monitors

stable inclusion
from stable-5.10.30
commit a22115c3492f209c4a5a8d04a0da8c4f29f25a0e
bugzilla: 51791

--------------------------------

commit 1534efc7 upstream.

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

Reported-by:  <syzbot+cde43a581a8e5f317bc2@syzkaller.appspotmail.com>
Signed-off-by: Alexander Aring <aahringo@redhat.com>
Link: https://lore.kernel.org/r/20210405003054.256017-16-aahringo@redhat.com


Signed-off-by: Stefan Schmidt <stefan@datenfreihafen.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Chen Jun <chenjun102@huawei.com>
Acked-by:   Weilong Chen <chenweilong@huawei.com>
Signed-off-by: Zheng Zengkai <zhengzengkai@huawei.com>