dt-bindings: power/supply: qcom,pmi8998-charger: Drop incorrect "#interrupt-cells...

dt-bindings: power/supply: qcom,pmi8998-charger: Drop incorrect "#interrupt-cells" from example

Enabling dtc interrupt_provider check reveals the example is missing
the "interrupt-controller" property as it is a dependency of
"#interrupt-cells". However, the PMIC parent node is not an interrupt
controller at all, so the "#interrupt-cells" is erroneous.

Signed-off-by: Rob Herring (Arm) <robh@kernel.org>
Reviewed-by: Krzysztof Kozlowski <krzk@kernel.org>
Link: https://lore.kernel.org/r/20240926213727.3064977-1-robh@kernel.org
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>