wifi: iwlwifi: unify checks for HW error values

The hardware, depending on which part fails or times out,
returns 0xA5A5A5A. or 0x5A5A5A5. with the lowest 4 bits
encoding some further reason/status. However, mostly we
don't really need to care about the exact reasons, so
unify the checks for this to avoid hardcoding those magic
values all over the driver.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Gregory Greenman <gregory.greenman@intel.com>
Link: https://lore.kernel.org/r/20230612184434.3e2959741a38.I1c297a53787b87e4e2b8f296c041921338573f4d@changeid


Signed-off-by: Johannes Berg <johannes.berg@intel.com>