arm64: dts: qcom: sm8250: Add support for LLCC block

Add support for Last Level Cache Controller (LLCC) in SM8250 SoC.
This LLCC is used to provide common cache memory pool for the cores in
the SM8250 SoC thereby minimizing the percore caches.

Reviewed-by: Sai Prakash Ranjan <saiprakash.ranjan@codeaurora.org>
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Link: https://lore.kernel.org/r/20201130093924.45057-3-manivannan.sadhasivam@linaro.org
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>