iwlwifi: update firmware for 7260 / 3160 devices

Add new firmware for devices: 7260 and 3160
version:
22.24.8.0

New version includes a bunch of bug fixes especially in GO mode.

Also fix the link since the old link is long deprecated.
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>

WHENCE

@@ -810,17 +810,17 @@ File: iwlwifi-7260-7.ucode
 Version: 22.1.7.0
 
 File: iwlwifi-7260-8.ucode
-Version: 22.15.8.0
+Version: 22.24.8.0
 
 File: iwlwifi-3160-7.ucode
 Version: 22.1.7.0
 
 File: iwlwifi-3160-8.ucode
-Version: 22.15.8.0
+Version: 22.24.8.0
 
 Licence: Redistributable. See LICENCE.iwlwifi_firmware for details
 
-Also available from http://intellinuxwireless.org/?n=Downloads
+Also available from http://wireless.kernel.org/en/users/Drivers/iwlwifi/?n=Downloads
 
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