dts: arm: st: l5: add missing #address-cells in exti node

Add missing #address-cells property in exti interrupt controller node.
This change prevents build warning messages when using DTC v1.6.1. With
former or later DTC versions, missing #address-cells property is ignored
but it remains requires as per DT schemas, e.g. [1]

Link: https://github.com/devicetree-org/dt-schema/blob/v2025.08/dtschema/schemas/interrupt-controller.yaml#L18 [1]
Signed-off-by: Etienne Carriere <etienne.carriere@st.com>
1 file changed