msm: pm-boot: Use new multicluster boot API to set warmboot addr

With multiple clusters, the warmboot address is passed into TZ using a new
API. TZ will support the new  multicluster API for single cluster
configuration as well. Query TZ for the availability of multicluster
support and use the corresponding API to set the warmboot address

Change-Id: I7abf99fed77eb169e27b0f8b6ede7e980e859693
Signed-off-by: Mahesh Sivasubramanian <msivasub@codeaurora.org>