Update to version 8.6.0 and include nrf.h and the additional
files it requires for nRF52. This is so drivers targetting the
nRF Family can include nrf.h directly instead of *nrf5*.h

Origin: Nordic MDK 8.6.0
URL: http://www.nordicsemi.com/eng/Products/Bluetooth-Smart-Bluetooth-low-energy/nRF52832


Maintained-by: External

JIRA: ZEP-377
Change-Id: I71ad9828e1cf95e4d6ef09182a24f00e7d9f01ad
Signed-off-by: Carles Cufi <[email protected]>