msm: thermal: Add support in KTM to mitigate the available cluster

Add support in KTM to mitigate the cluster which has
booted and have clock plan updated. With this
change KTM mitigation doesn't wait till the frequency plan
for all the clusters are updated.

Change-Id: Iad1ab5f3ddd46b82107be0952e25bedc3bbe0e53
Signed-off-by: Ram Chandrasekar <rkumbako@codeaurora.org>