iwlwifi: pcie: don't switch FW to qnj when ax201 is detected

We have a too generic condition that switches from Qu configurations
to QnJ configurations.  We need to exclude some configurations so that
they are not erroneously switched.  Add the ax201 configuration to the
list of exclusions.

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