The sensor shell can handle / does everything this sample does so just
remove the sample in favor of sensor shell.
Signed-off-by: Kumar Gala <galak@kernel.org>
Add simple application to demonstrate quadrature decoder sensor.
Tested on Atmel SMART SAM E70 Xplained board.
Signed-off-by: Piotr Mienkowski <piotr.mienkowski@gmail.com>