

Reset register SCI_EN on resume. The ACPI spec clearly states we don't have
to do this, but many machines don't, or forget to, which leads to all sorts
of problems on resume (broken battery stats, overheating, failure to resume
more than once, etc).

tested by many, ok marco@, deraadt@

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