dt-bindings: arm/cpus: allow up to 3 interconnects entries

Allow up to 3 entries as used on the Qualcomm SM8650 CPU nodes.

This fixes the following errors:
cpu@0: interconnects: [[7, 3, 3, 7, 15, 3], [8, 0, 3, 8, 1, 3], [9, 0, 9, 1]] is too long

Fixes: 791a3fcd2345 ("dt-bindings: arm/cpus: Add missing properties")
Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>
Link: https://lore.kernel.org/r/20250418-topic-sm8x50-upstream-cpu-icc-max3-v1-1-87d9c2713d72@linaro.org


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