- iwn_mem_set_region_4 wants a number of 32-bit words, not bytes.   fix callers (avoid erasing random registers) - do not enable chain mode for command queue (>=5000 Series only.)
- iwn_mem_set_region_4 wants a number of 32-bit words, not bytes.
  fix callers (avoid erasing random registers)
- do not enable chain mode for command queue (>=5000 Series only.)

orumin/openbsd-efivars,orumin/openbsd-efivars,orumin/openbsd-efivars,orumin/openbsd-efivars