iwlwifi: remove unused iwlax210_2ax_cfg_so_hr_a0 structure

We don't use this structure anymore, except for a check that will
never match, so we can remove this structure entirely.

Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Link: https://lore.kernel.org/r/iwlwifi.20211204083238.c41548abd174.I6bb4f6058fd85e1dd92cd056b6eaca1cb4aa74a3@changeid


Signed-off-by: Luca Coelho <luciano.coelho@intel.com>