wifi: iwlwifi: mvm: initialize max_rc_amsdu_len per-link

Initialize max_rc_amsdu_len per-link both on state change and when a new
link is added.

Signed-off-by: Benjamin Berg <benjamin.berg@intel.com>
Signed-off-by: Gregory Greenman <gregory.greenman@intel.com>
Link: https://lore.kernel.org/r/20230329100039.5bf521fe58b8.I73fe585f0ff75d41b5afd32077e3d6e48c90db2a@changeid


Signed-off-by: Johannes Berg <johannes.berg@intel.com>