wifi: iwlwifi: mld: CHANNEL_SURVEY_NOTIF is always supported

This notification is supported in FW since API 100.
Since we don't support any API older than that, we don't need to check
whether the notification is supported.

Reviewed-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Miri Korenblit <miriam.rachel.korenblit@intel.com>
Link: https://patch.msgid.link/20250909061931.b43f7da0d63b.I7386aeef5fae70dc4b0901cfb650eeaecb4c1575@changeid