MFC r325122,r325124,r325125:

Fill in the blanks for iwm8265fw(4) rules, missed in r324434

Now using "device iwmfw" or "device iwm8265fw" in one's kernel configuration
will potentially result in a working IWM8265 series wireless SoC.

This is an alternative to the fix that was made in r324470 for
sys/modules/iwmfw.