clk: msm: clock-gcc-cobalt: Enable support to scale the aggre clocks

The aggre NoC clocks are controlled by RPM and until now,
HLOS has only had to enable/disable the resource when
required. Due to a new requirement, enable support to
scale these resources as well.

Change-Id: I3b141d62f6c3b479d8d61ae7829e9f5ca72a3886
CRs-Fixed: 1030966
Signed-off-by: Deepak Katragadda <dkatraga@codeaurora.org>