This patch adds "frequency table helpers" to kernel/cpufreq.c and
updates some drivers to use them.

Most CPU frequency scaling methods only support a few static
frequencies. In these drivers a lot of duplicated code existed in the
->setpolicy and ->verify calls.

Please note that this in no way changes the behaviour of cpufreq or of
the ->setpolicy or ->verify calls. These "frequency table helpers"
aren't for drivers which either only support policies (longrun) or
really many frequency states (ARM, gx-suspmod).

Make gcc-2.91.66 happy. Noted by Andrew Morton - thanks.

Add support for mobile Pentium IV processors with stepping 7.

into home.transmeta.com:/home/torvalds/v2.5/linux

into tetrachloride.(none):/mnt/stuff/kernel/2.5/watchdog

into tetrachloride.(none):/mnt/stuff/kernel/2.5/watchdog

into home.transmeta.com:/home/torvalds/v2.5/linux

into tetrachloride.(none):/mnt/stuff/kernel/2.5/agpgart

version before looking at more complicated changes.

This fixes a potential problem in the migration thread for the case that
the first CPU in the cpus_allowed mask of a process is offline.

This fixes the 'iret' exception recovery code to use the new ES/DS segment
rules - load them with __USER_DS instead of __KERNEL_DS.

It also fixes a typo in a comment.