PM / devfreq: Add support for new tz CMD IDs

Some platforms require new CMD IDs to support tz functionality.
Check the ID supported and call the appropriate scm call.

Change-Id: I07568a9102e0eebf07caf4aac0e476eafcf5fb23
Signed-off-by: Suman Tatiraju <sumant@codeaurora.org>