usb_ecm: Disable tracing by default.

usb_ecm: switch to the new driver API

Change-Id: I385d70b3245d6b18c3593cf2672445ccfb000f13
Reviewed-on: https://review.haiku-os.org/c/haiku/+/5754
Reviewed-by: X512 <danger_mail@list.ru>
Reviewed-by: Adrien Destugues <pulkomandy@pulkomandy.tk>
Tested-by: Commit checker robot <no-reply+buildbot@haiku-os.org>

drivers/network: Move ethernet drivers to an "ether" subdirectory.

Now that there is also a "tap" driver in here, and the WiFi drivers
are also in a subdirectory, moving the physical ethernet device drivers
to a subdirectory also makes sense.

(Briefly) discussed on the mailing lists.