ARM: dts: msm: Enable the MMSS clock driver on MSMCOBALT

Enable support to model the multimedia clocks instead of
using dummy clocks. We are still using dummy clocks on
RUMI until the FSM dependencies can be met.

Change-Id: I1827188e554fab50db531091dde7ff99a366d823
Signed-off-by: Deepak Katragadda <dkatraga@codeaurora.org>