cpuidle: lpm-levels: Fix logic in choosing a cluster low power

If atleast one of the core in a cluster is online, the cluster low power
modes should be determined by the idle characteristics. In one scenario,
when the last core to configure the cluster enters the low power modes
as a part of hotlug but the remainder of the cores are online, the
selection of the cluster low power modes should use parameters related
to idle states and not suspend states.

Change-Id: Ia0af8b57f668225736cfe4a7a33436fed6ffcd4a
Signed-off-by: Mahesh Sivasubramanian <msivasub@codeaurora.org>