wifi: iwlwifi: mvm: rename iwl_missed_beacons_notif

A new version is coming up. Rename the current struct to include the
current version.

s/iwl_missed_beacons_notif/iwl_missed_beacons_notif_v4

Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Miri Korenblit <miriam.rachel.korenblit@intel.com>
Link: https://patch.msgid.link/20240808232017.b5c3a83a05ef.I698611582b5ca8395f42a535c51f7230307e2c6f@changeid


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