rtl8125: Modifications and additions to make it compile.

Tested by andreasdr and confirmed to work. Thanks!

Fixes #17835.

Change-Id: Ied6dd316741b9f0451fc0aeda69abdf9d8a5fb43
Reviewed-on: https://review.haiku-os.org/c/haiku/+/6042
Reviewed-by: waddlesplash <waddlesplash@gmail.com>