ARM: dts: msm: Add core hang detection devicetree nodes for Kona.

Core hang detect driver enables hang detection by configuring
threshold time and PMU event mux select. Add device tree node
for gold and silver cores to enable core hang detection.

Change-Id: I4b0971ec658bd804ac8aef71183ebd6acf24e79b
Signed-off-by: Rishabh Bhatnagar <rishabhb@codeaurora.org>