dt-bindings: arm: cpus: Add kryo240 compatible

Kryo240 is found in SM4250, the slower sibling of the SM6115.

Signed-off-by: Iskren Chernev <iskren.chernev@gmail.com>
Reviewed-by: Vinod Koul <vkoul@kernel.org>
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20220919180618.1840194-3-iskren.chernev@gmail.com


Signed-off-by: Rob Herring <robh@kernel.org>