fix initialization of apm_dobusy and apm_doidle to be off by default until apm attaches and we know what the correct state should be, also ensure that they are set to off if the kernel apm thread fails to create.
fix initialization of apm_dobusy and apm_doidle to be off by default until
apm attaches and we know what the correct state should be, also ensure that
they are set to off if the kernel apm thread fails to create.

ok toby@, marco@

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