x86: Enhanced Speedstep CPU Power Management

This device management enhancement is new in the Developer 1/08 release.

Stating with this release, Intel's Enhanced Speedstep^TM technology is supported on Solaris. Enhanced Speedstep support enables Solaris users to manage the power consumption of their Intel processors by lowering the processor frequency during idle periods.

For more information on how to enable Solaris CPU power management, see the power.conf(4) man page.