After MLO, we will need to consider not only active chanctx but also active
interfaces (roles) to decide entity things. So in advance, we move handling
from chanctx_ops::add/remove to chanctx_ops::assign_vif/unassign_vif. Then,
we can recalculate and aware active interfaces' changes.

For now, behavior should not be really different, since active chanctx and
active interface are one-to-one mapping before MLO.
Signed-off-by: Zong-Zhe Yang <kevin_yang@realtek.com>
Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Signed-off-by: Kalle Valo <kvalo@kernel.org>
Link: https://msgid.link/20240206030624.23382-6-pkshih@realtek.com