Merge tag 'x86-misc-2021-08-30' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull misc x86 updates from Thomas Gleixner:
 "A set of updates for the x86 reboot code:

   - Limit the Dell Optiplex 990 quirk to early BIOS versions to avoid
     the full 'power cycle' alike reboot which is required for the buggy
     BIOSes.

   - Update documentation for the reboot=pci command line option and
     document how DMI platform quirks can be overridden"

* tag 'x86-misc-2021-08-30' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/reboot: Limit Dell Optiplex 990 quirk to early BIOS versions
  x86/reboot: Document how to override DMI platform quirks
  x86/reboot: Document the "reboot=pci" option