arch: arm: nrf: add hardware description for nrf Kconfig files

Created NRF5x peripheral list that can be used to describe each
NRF5x SoC. Basing on this description Kconfig file can display
and allow to configure only these drivers that are available
for particular SoC.

Signed-off-by: Jakub Rzeszutko <jakub.rzeszutko@nordicsemi.no>