Add basic support for LinkSprite pcDuino board series
including pcDuino, pcDuino-Lite, pcDuino-Lite-WiFi.
Tested on pcDuino-Lite-WiFi.
Signed-off-by: Sergey Matyukevich <geomatsi@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
