ARM: dts: msm: Add llcc device tree support for SDM670

SDM670 supports two instances of Last level cache controller
for total 512KB of system cache. Add device tree support for
these llcc instances to service SDM670 system cache clients
request for slices.
Also add dump size to allocate buffers for llcc cache dumps.

Change-Id: I23d9bc27cc1fe7fcbac222cb347cc1d9b87b7d10
Signed-off-by: Lingutla Chandrasekhar <clingutla@codeaurora.org>