ATMEL/PIO: Enable new feature of PIO on Atmel device

Enable new PIO feature supported by Atmel SoC.
Using CPU_HAS_PIO3 micro to enable PIO new feature.

Signed-off-by: Bo Shen <voice.shen@atmel.com>
Signed-off-by: Andreas Bießmann <andreas.devel@googlemail.com>
2 files changed