TMC2130/5160 can make use of `spi3`, which is operated on the software SPI pins in the current configuration. The supplied defaults for software SPI do not currently work.
Heater0 pin was marked incorrectly, should be `PB0`
Signed-Off-By: Wijnand Modderman-Lenstra <maze@maze.io>
Now that the documentation recommends that hold_current not be set,
update the example config files to not specify a hold_current.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>