drivers: cpuidle: lpm-levels: Add support per cluster prediction

Add feature to enable/disable CPU prediction on a cluster level. This
allows more finer tuning based on power/perf requirements.

Change-Id: I1ce26c04fd3a25ee1f724da5814074308484baca
Signed-off-by: Mahesh Sivasubramanian <msivasub@codeaurora.org>