msm: dcvs: change tz buffer to 32KB

Only around 32K of buffer is required for normal operation.
Request the scm buffer of 32kb from the contiguous area.

Change-Id: If79471c6e0cfe80b1796a14d83ea10eb6b919e40
Signed-off-by: Abhijeet Dharmapurikar <adharmap@codeaurora.org>

*revised patch to apply to Mako