* To avoid spurious CDC ACM instances when usint CDC ACM for something
other than logging, move to the approach used by Zephyr of using a
snippet to redirect console output to a CDC ACM node added by the
snippet. Remove all the existing static CDC ACM nodes.
* Add new `zmk-usb-logging` snippet that mirrors the upstream
`cdc-acm-logging` snippet, but still does our extra USB logging
configuration.
* Updated logging docs accordingly.
Co-authored-by: Cem Aksoylar <caksoylar@users.noreply.github.com>
Removed "label" properties which no longer have any function.
Labels are still used as layer names and as identifiers for sending
behaviors between sides of a split keyboard, so those have been left
alone for now.
* Remove MISO pin from pinctrl for BDN9 rev2 board, to avoid
the 4th switch being set up for an alternate function, which
was causing spurious key press events to be triggered.
