cpu_offline. Use this on amd64/i386 to force a FPU save. As this was
triggered by npxsave_cpu/fpusave_cpu not working for a different CPU,
remove the cpu_info argument and adjust npxsave_*/fpusave_* to use bool
for the save.
OK ad@
ACPI wakeup code and teach it how to start the APs again. As a side
effect the CPU_START interface allows choosing between different
bootstrap codes more easily now.
martin