defconfig: arm64: Enable CDSP request manager for bengal

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

Change-Id: If0ca961b41928255d090a79143305a69f9178e4c
Acked-by: Sreekanth Gande <sgande@qti.qualcomm.com>
Signed-off-by: Tharun Kumar Merugu <mtharu@codeaurora.org>