msm: ocmem: Add clock management support

Manage the OCMEM core and branch clocks and keep them
on only when required to minimize the power impact.

Change-Id: I33339b317c1ec76af27bae56c552cb50fef3da0c
Signed-off-by: Naveen Ramaraj <nramaraj@codeaurora.org>
6 files changed