ARM: dts: stm32: add iwdg2 support for stm32mp157c

This patch adds independent watchdog support for stm32mp157c.
Signed-off-by: Ludovic Barre <ludovic.barre@st.com>
Acked-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Alexandre Torgue <alexandre.torgue@st.com>

arch/arm/boot/dts/stm32mp157c.dtsi

@@ -1034,6 +1034,14 @@ ltdc: display-controller@5a001000 {
 			status = "disabled";
 		};
 
+		iwdg2: watchdog@5a002000 {
+			compatible = "st,stm32mp1-iwdg";
+			reg = <0x5a002000 0x400>;
+			clocks = <&rcc IWDG2>, <&rcc CK_LSI>;
+			clock-names = "pclk", "lsi";
+			status = "disabled";
+		};
+
 		usbphyc: usbphyc@5a006000 {
 			#address-cells = <1>;
 			#size-cells = <0>;