dt-bindings: net: mediatek,net: narrow interrupts per variants

Each variable-length property like interrupts must have fixed
constraints on number of items for given variant in binding.  The
clauses in "if:then:" block should define both limits: upper and lower.

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Reviewed-by: Rob Herring (Arm) <robh@kernel.org>
Link: https://patch.msgid.link/20240818172905.121829-1-krzysztof.kozlowski@linaro.org


Signed-off-by: Jakub Kicinski <kuba@kernel.org>