soc/Kconfig: Move SOC_COMPATIBLE_NRF* options to soc/nordic/Kconfig

Since the change to HWmv2 we do not need to have this options in the
top level anymore. Let's move them into the top level Nordic SOC
Kconfig file.
(Note they moving into into each individual soc Kconfig would
add a dependency on SOC_FAMILY_NORDIC_NRF which is not set for
bsim targets)

Signed-off-by: Alberto Escolar Piedras <alberto.escolar.piedras@nordicsemi.no>