kernel: Use IS-specific entropy function when available

During the early boot process, in prepare_multithreading(), the kernel
structures and scheduler are not ready yet. In order to obtain entropy
for early works such as stack randomization, optionally use when present
the ISR-specific function that some drivers will provide.

Signed-off-by: Carles Cufi <carles.cufi@nordicsemi.no>
1 file changed