iwm: Stop shipping firmware as kernel module

Since we can load raw firmware start shipping them as is.
This also remove the uuencode format that don't add any value and garbage
collect old firmwares

iwm: Stop shipping firmware as kernel module

Since we can load raw firmware start shipping them as is.
This also remove the uuencode format that don't add any value and garbage
collect old firmwares version.
For pkgbase users they are now in the FreeBSD-firmware-iwm package.

Sponsored by: Beckhoff Automation GmbH & Co. KG

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