defconfig: msm: enable remote debugger driver on Bengal

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: Ic76b47cdf95b834b1e062126b27b59a42b0e1276
Acked-by: Devender Kaushik <dkaushik@qti.qualcomm.com>
Signed-off-by: Mohammed Nayeem Ur Rahman <mohara@codeaurora.org>