Since Nordic does not offer an nRF52810 Development Kit and instead
recommends using the nRF52 DK (nRF52832 based), add a board that
enforces the limitations of the nRF52810 but is designed to be flashed
onto the actual nRF52 DK hardware.
Signed-off-by: Carles Cufi <carles.cufi@nordicsemi.no>
Signed-off-by: Ioannis Glaropoulos <ioannisg.glaropoulos@nordicsemi.no>