Implement stubs for ARM CMSIS intrinsics,
to be used locally for nrf52_bsim builds.
Signed-off-by: Ioannis Glaropoulos <Ioannis.Glaropoulos@nordicsemi.no>
Provide a very simple model of the DSB ARM
instruction as no-operation. The implementation
is provided in a cmsis.h header file added
in the nrf52_bsim board directory.
Signed-off-by: Ioannis Glaropoulos <Ioannis.Glaropoulos@nordicsemi.no>