ARM: dts: msm: Add GPU hardware revisions for SDM670

Add qcom,gpu-hw-revisions property for SDM670 to enable
efuse based GPU hardware revision selection.

Change-Id: Ide1011a82af8458daf9720232e311730667b06a7
Signed-off-by: Deepak Kumar <dkumar@codeaurora.org>
Signed-off-by: Prakash Kamliya <pkamliya@codeaurora.org>