iwlwifi: pcie: fix recognition of QuZ devices

If the HW revision of Qu devices we found is QuZ, then we need to
switch the configuration accordingly in order to use the correct FW.

Add a block of ifs in order do that.

Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>