msm: defconfig: Enable ADSP remote debugger driver for msm8937

Enable CONFIG_MSM_RDBG to allow remote debugging on msm8937
with remote DSP processors.

Change-Id: I008c9c363d91448e996db43ce438e8f92f54813f
Acked-by: Bharath Kumar <bkumar@qti.qualcomm.com>
Signed-off-by: Sathish Ambley <sathishambley@codeaurora.org>