dt-bindings: arm: cpus: Add kryo685 compatible

Kryo685 is found in SM8350, so add it to the list of cpu compatibles

Signed-off-by: Vinod Koul <vkoul@kernel.org>
Link: https://lore.kernel.org/r/20210127123054.263231-4-vkoul@kernel.org
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>