defconfig: msm: enable remote debugger driver

Add 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: I4a96cd5ee354d9be0b2f77eaf3330b6529154aa6
Acked-by: Devender Kaushik <dkaushik@qti.qualcomm.com>
Signed-off-by: Jeya R <jeyr@codeaurora.org>