dt-bindings: interconnect: Add Qualcomm SM8450 DT bindings

The Qualcomm SM8450 SoC has several bus fabrics that could be
controlled and tuned dynamically according to the bandwidth demand

Signed-off-by: Vinod Koul <vkoul@kernel.org>
Acked-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20211209084842.189627-2-vkoul@kernel.org
Signed-off-by: Georgi Djakov <djakov@kernel.org>