Rename find_pmtimer() to find_acpi_features()

I'm about to make it do more than just the pmtimer...

Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
Add acpi_reboot() reset method using RESET_REG

Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
Try to detect an unsuccessful hard-reboot to prevent soft-reboot loops.

There have been various kvm bugs that prevent reboots from working
properly.  Generalize the existing test for a failed reboot to better
catch these cases.

Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
Minor - fix confusing final_sec32low_start name in layoutrom.py.

Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
Minor - introduce numeric defines for the IVT offset of hw irqs.

Signed-off-by: Kevin O'Connor <kevin@koconnor.net>