macppc: mediabay(4), smu(4), xlights(4): tsleep(9) -> tsleep_nsec(9)

This diff completely converts sys/arch/macppc to *sleep_nsec(9).

Also convert dev/thermal.c while we're down here. Unsure what

macppc: mediabay(4), smu(4), xlights(4): tsleep(9) -> tsleep_nsec(9)

This diff completely converts sys/arch/macppc to *sleep_nsec(9).

Also convert dev/thermal.c while we're down here. Unsure what that
file's driver's name is, if any.

ok kn@ visa@

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Reorder code to avoid a divide by zero when there are no sensors.
Tested by and ok mglocker@

Fix shutdown sequence.

Some of our fan scaling calculations with the muK temperature unit above
59 degC require temporary values larger than 32bit signed. Therefore
bump those involved variables to int64_t and replace imi

Some of our fan scaling calculations with the muK temperature unit above
59 degC require temporary values larger than 32bit signed. Therefore
bump those involved variables to int64_t and replace imin/imax with
ulmin/ulmax to get proper results.

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Ooops, fix the OpenBSD tag.

Add a thermal management framework for macppc which controls the fan speed
based on the temperature sensor values. A driver can register it fans or
temperature sensors there. Ported from FreeBSD.

Add a thermal management framework for macppc which controls the fan speed
based on the temperature sensor values. A driver can register it fans or
temperature sensors there. Ported from FreeBSD.

ok deraadt kettenis

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