iwlwifi: set max firmware version of 7265 to 17

Just like 7260, 7265 will not have firmware releases newer
than iwlwifi-7265-17.ucode. 7265D is still supported in
latest firmware releases.

Fixes: 628a2918 ("iwlwifi: separate firmware version for 7260 devices")
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>