tests: kernel: fatal: minor #ifdef guard fix

HW Stack protection is required to successfully run the
stack overflow-related tests, so guard all these tests
inside #ifdef CONFIG_HW_STACK_PROTECTION. Otherwise this
test-suite fails for platforms that implement USERSPACE
but do not have HW_STACK_PROTECTION capability.

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