Some NRF52 boards are able to use the internal power-efficient DC/DC regulator. Add a new class that can be inherited by board classes to enable this feature and reduce the power consumption. Signed-off-by: Frieder Schrempf <frieder@fris.de>
Added NRF52Board.h and NRF52Board.cpp Modified NRF52 variants to extend from NRF52Board to share common feature