[PATCH] smpfatal08: halt secondary RISC-V processors

[Jiri Gaisler]

smpfatal08 fails on SMP RISC-V systems because all cpus are started by the boot-loader and clobber the test output. This patch stops the secondary cpus with a WFI (wait-for-interrupt). Harmless if only one cpu is started by the loader, as in the griscv bsp.

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