Phi Tran is adding an ioctl to PARC 2006/601 Battery Project. This 
work is required and targeted for OpenSolaris 2008.11 release. I'm setting
this admendment as self-approved as a simple ioctl should be straightforward.

Proposal:
I'm adding an ioctl in acpi_drv to allow for updating a computer laptop
lid status.  This is an extension of PSARC 2006/601 Battery Project.
This ioctl is useful when the hardware lid status may have changed during suspend.

Exported Interface:
Project Private ioctl ACPI_DRV_IOC_LID_UPDATE
  If this ioctl returns 0 for the integer argument, then it means the
    laptop lid is closed. 
  If ioctl returns a non-zero value for the argument, then it
    means the laptop lid is opened.

References:
PSARC 2006/601 Battery Project
PSARC 2008/021 HAL Power Management Support