iwlwifi: dbg_ini: support FW notification dumping in case of missed beacon

Pass the FW notification packet to the dump collection flow to allow
the driver to include it in the dump file if requested.

Signed-off-by: Shahar S Matityahu <shahar.s.matityahu@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>