defconfig: arm: Enable CDSP request manager for bengal

CDSP request manager serves CPU QoS requests to optimize FastRPC
performance for CDSP applications.

Change-Id: If799d7119c0d405801b38584e9a1fe4bb570f04c
Acked-by: Sreekanth Gande <sgande@qti.qualcomm.com>
Signed-off-by: Tharun Kumar Merugu <mtharu@codeaurora.org>