Don't call cpu_setup() twice on non-MULTIPROCESSOR kernels.  Fixes problems with longrun on the Transmeta Crusoe.
Don't call cpu_setup() twice on non-MULTIPROCESSOR kernels.  Fixes problems
with longrun on the Transmeta Crusoe.

tested by ian@, grange@
ok hshoexer@, weingart@

orumin/openbsd-efivars,orumin/openbsd-efivars,orumin/openbsd-efivars,orumin/openbsd-efivars