fix(stm32mp15-fdts): use interrupts-extended for i2c2

Update SoC DT file STM32MP151 to use interrupts-extended instead of
interrupts for i2c2. This correct a compilation warning:
build/stm32mp1/debug/fdts/stm32mp157c-ev1-bl2.pre.dts:23.3-26:
 Warning (interrupts_property): /soc/i2c@40013000:#interrupt-cells:
  size is (28), expected multiple of 12

Signed-off-by: Yann Gautier <yann.gautier@st.com>
Change-Id: If512807cd23c72f95e1e02b15f30d20a849d8412
diff --git a/fdts/stm32mp151.dtsi b/fdts/stm32mp151.dtsi
index a938edc..869b912 100644
--- a/fdts/stm32mp151.dtsi
+++ b/fdts/stm32mp151.dtsi
@@ -127,8 +127,8 @@
 			compatible = "st,stm32mp15-i2c";
 			reg = <0x40013000 0x400>;
 			interrupt-names = "event", "error";
-			interrupts = <&exti 22 IRQ_TYPE_LEVEL_HIGH>,
-				     <&intc GIC_SPI 34 IRQ_TYPE_LEVEL_HIGH>;
+			interrupts-extended = <&exti 22 IRQ_TYPE_LEVEL_HIGH>,
+					      <&intc GIC_SPI 34 IRQ_TYPE_LEVEL_HIGH>;
 			clocks = <&rcc I2C2_K>;
 			resets = <&rcc I2C2_R>;
 			#address-cells = <1>;