dt-bindings: interconnect: Add Qualcomm SDX55 DT bindings

The Qualcomm SDX55 platform has several bus fabrics that could be
controlled and tuned dynamically over RPMh according to the bandwidth
demand.

Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Link: https://lore.kernel.org/r/20210121053254.8355-2-manivannan.sadhasivam@linaro.org


Signed-off-by: Georgi Djakov <georgi.djakov@linaro.org>