dt-bindings: interconnect: Add bindings for Qualcomm SDM660 NoC

Add the bindings for the Qualcomm SDM660-class NoC, valid for
SDM630, SDM636, SDM660 and SDA variants.

Signed-off-by: AngeloGioacchino Del Regno <kholk11@gmail.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20201017133718.31327-2-kholk11@gmail.com
Signed-off-by: Georgi Djakov <georgi.djakov@linaro.org>