It is useful to be able to toggle at runtime whether particular DCVS points are used as transient levels. This adds a sysfs node per core which when read returns a list of the currently enabled DCVS transient levels. Writing the frequency of a DCVS transient level toggles whether it is enabled or not. Change-Id: I69ebb6974e97efa832798047259b9acdfd08aa7c Signed-off-by: Steve Muckle <smuckle@codeaurora.org> (cherry picked from commit 2f6db34b3216695d4f624d2204d5e1356e62c3d5)