iwlwifi: Update iwlwifi.4 and iwlwififw.4 device list

Update the man pages for iwlwifi.4 and iwlwififw.4 to list the
current state of devices supported and which firmware they need.
The list is automatically generated based on a sysctl added to the
iwlwifi driver (so this is the driver's view). The reader should
not be surprised by the larger number of any/any/any/any entries
for PCI vendor and devices in the firmware table for which other
matching logic happens. The reader should also not be confused
about "TBD" (to be done) entries for chipsets which the driver
already supports but have no (public) product yet.

Sponsored by: The FreeBSD Foundation

(cherry picked from commit 242f314842767c36eaaacca9f433c80d34def39c)