dt-bindings: interconnect: Update QTI SDM845 DT bindings

Redefine the Network-on-Chip devices to more accurately describe
the interconnect topology on QTI's SDM845 platform. Each
interconnect device can communicate with different instances of the
RPMh hardware which are described as RSCs(Resource State Coordinators).

Change-Id: Icc4ad0410e98bef4a7acc786a19bb4048ae2b1a8