ext: hal: nordic: add nrfx misc for nRF9160

This commit introduces compile definitions for nrfx, and
lets the build compile in system_nrf9160.c, when building
for nrf9160 SoCs.

Signed-off-by: Ioannis Glaropoulos <Ioannis.Glaropoulos@nordicsemi.no>
1 file changed