Revert "mac80211: allow using AP_LINK_PS with mac80211-generated TIM IE"

Revert "mac80211: allow using AP_LINK_PS with mac80211-generated TIM IE"

This reverts commit 2f34ede085ae2f04a1b9edc38abc85c3aef2b6a1.

__sta_info_recalc_tim turns into a no-op if local->ops->set_tim is not
set. This prevents the beacon TIM bit from being set for all drivers
that do not implement this op (almost all of them), thus thoroughly
essential AP mode powersave functionality.

Cc: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Fixes: 2f34ede085ae ("mac80211: allow using AP_LINK_PS with mac80211-generated TIM IE")
Signed-off-by: Felix Fietkau <nbd@nbd.name>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>