dts: arm: stm32mp2_m33.dtsi: add iwdg4 watchdog node

This is the independent watchdog for the non-secure world of M33 core.

Signed-off-by: Luc BEAUFILS <luc.beaufils@savoirfairelinux.com>

Author: lucbeaufils

dts/arm/st/mp2/stm32mp2_m33.dtsi

@@ -326,6 +326,13 @@
 			status = "disabled";
 		};
 
+		iwdg: iwdg4: watchdog@44040000 {
+			compatible = "st,stm32-watchdog";
+			reg = <0x44040000 DT_SIZE_K(1)>;
+			clocks = <&rcc STM32_CLOCK(IWDG4, STM32_CLK)>;
+			status = "disabled";
+		};
+
 		wwdg: wwdg1: watchdog@44050000 {
 			compatible = "st,stm32-window-watchdog";
 			reg = <0x44050000 DT_SIZE_K(1)>;