ARM: dts: msm: Add cdsp rpmsg entry in Kona

CDSPRM module relies on the rpmsg node to create a communication
channel with CDSP. The node also carries information for Cx i-peak
limit management, CPU QoS voting, HVX, CDSP thermal mitigation
frameworks.

CDSPRM module implements a RPMSG interface to communicate with CDSP
while providing a way for CDSP to vote for CPU L3 clock, CPU QoS to
benefit CDSP applications performance. The module also implements
an interface with NPU for Cx i-peak limit management and registers
cooling devices for CDSP and HVX thermal mitigation.

Change-Id: Ie5d3897fd220a00ed3bb66c44cf5f80b9a9c3ba8
Acked-by: Sreekanth Gande <sgande@qti.qualcomm.com>
Signed-off-by: Tharun Kumar Merugu <mtharu@codeaurora.org>