ARM: dts: msm: Add remote debugger device configuration for sdm660

Adding remote debugger device configuration. The Remote Debugger driver
allows a debugger running on a host PC to communicate with a remote
stub running on peripheral subsystems.

Change-Id: I89e686c7e049a9fc8e1b6173ce009333df5b4ca1
Acked-by: Chenna Kesava Raju <chennak@qti.qualcomm.com>
Signed-off-by: Tharun Kumar Merugu <mtharu@codeaurora.org>