dt-bindings: media: qcom,sm8250-camss: Fix interrupt types

Qualcomm IP catalog says that all CAMSS interrupts are edge rising,
fix it in the documented example from CAMSS device tree bindings for
SM8250 SoC.

Fixes: 46f8ac84 ("media: dt-bindings: media: camss: Add qcom,sm8250-camss binding")
Signed-off-by: Vladimir Zapolskiy <vladimir.zapolskiy@linaro.org>
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Reviewed-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>