Add firmware for Intel 6000 Series Wi-Fi Adapters

Firmware for Intel 6000 Series Wi-Fi Adapters is version 9.193.4.1

Changelog:
- Sync with fixes from factory
- Fix CTKILL issue after resume
- Fix TC error resulting in NMI On 8KiB AMSDU frames required at
  least 4KiB free space
- Fix for 6000 series cards with EEPROM
Signed-off-by: Reinette Chatre <reinette.chatre@intel.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>

WHENCE

@@ -655,6 +655,9 @@ Info: v8.24.2.2
 File: iwlwifi-1000-3.ucode
 Info: v128.50.3.1
 
+File: iwlwifi-6000-4.ucode
+Info: v9.193.4.1
+
 Licence: Redistributable. See LICENCE.iwlwifi_firmware for details
 
 Also available from http://intellinuxwireless.org/?n=Downloads