iwlwifi: pcie: remove mangling for iwl_ax101_cfg_qu_hr

All devices that use iwl_ax101_cfg_qu_hr are recognized via the device
info table, so the cfg will never be iwl_ax101_cfg_qu_hr.  Remove the
code that converts this into QuZ and Qu-C, since it's not needed
anymore.

Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Link: https://lore.kernel.org/r/iwlwifi.20200424194456.30b6b4aae1c1.If5e583835c9f7f2771a50ba1b2f33bb85f25b383@changeid