ARM: dts: msm: Add ETM devices for SDM845

Add ETM devices to the device tree for SDM845. Coresight device
paths from ETM sources to ETR sink are added to the device tree.
The paths are needed to configure and enable ETM logging.

Change-Id: I1f9554964400dae1fcce25c80fd937e315a4403b
Signed-off-by: Satyajit Desai <sadesai@codeaurora.org>