wifi: mac80211: refactor CSA queue block/unblock

This code is duplicated many times, refactor it into
new separate functions.

Reviewed-by: Miriam Rachel Korenblit <miriam.rachel.korenblit@intel.com>
Link: https://patch.msgid.link/20240612143037.1ad22f10392d.If21490c2c67aae28f3c54038363181ee920ce3d1@changeid


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