ARM: dts: msm: Add "qcom,core-dev-table" for msm8996 target

This will enable memlat_cpu0 & msmlat_cpu2.
The governor expects a "qcom,core-dev-table" table as part of a given
memlat hardware monitor's device tree node.

This table is read upon registration of the memlat governor. The table
is then used to determine the memory bandwidth vote corresponding to the
maximum of the core frequencies.

Change-Id: If2f3d86a830e8c2fcd341510e93eb32b41c18812
Signed-off-by: Rahul Shahare <rshaha@codeaurora.org>