wifi: iwlwifi: mvm: implement BAID link switching

When we switch station links, also add the code to switch
BAIDs from one station mask to the new one.

To do so, refactor the switching code a bit to have common
code for all the needed switches; will add keys next.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Gregory Greenman <gregory.greenman@intel.com>
Link: https://lore.kernel.org/r/20230416154301.40654afce24f.I0e35151f69e7513be53ddb8f008e9ab48278c352@changeid


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