ARM: dts: msm: Add core hang detection to dt for Shima

Add qcom,msm-hang-detect to device tree to enable MSM Core Hang
Detection on all cores.

Changed from 2 nodes (one for each of silver and gold) to
1 node because that's semantically correct for the driver.

Change-Id: I063d7cc244a0b5d12971f393f45053914fa53179