ARM: dts: stm32mp13: alignment with v5.19

Device tree alignment with Linux kernel v5.19-rc1 with:
- ARM: dts: stm32: add UserPA13 button on stm32mp135f-dk
- ARM: dts: stm32: add blue led (Linux heartbeat) on stm32mp135f-dk
- ARM: dts: stm32: add EXTI interrupt-parent to pinctrl node on stm32mp131
- ARM: dts: stm32: enable RTC support on stm32mp135f-dk
- ARM: dts: stm32: add RTC node on stm32mp131
- ARM: dts: stm32: fix pinctrl node name warnings (MPU soc)

Signed-off-by: Patrick Delaunay <patrick.delaunay@foss.st.com>
Reviewed-by: Patrice Chotard <patrice.chotard@foss.st.com>
diff --git a/arch/arm/dts/stm32mp131.dtsi b/arch/arm/dts/stm32mp131.dtsi
index 8f7af65e..84e16bb 100644
--- a/arch/arm/dts/stm32mp131.dtsi
+++ b/arch/arm/dts/stm32mp131.dtsi
@@ -113,6 +113,12 @@
 			compatible = "fixed-clock";
 			clock-frequency = <99000000>;
 		};
+
+		clk_rtc_k: clk-rtc-k {
+			#clock-cells = <0>;
+			compatible = "fixed-clock";
+			clock-frequency = <32768>;
+		};
 	};
 
 	intc: interrupt-controller@a0021000 {
@@ -256,6 +262,15 @@
 			status = "disabled";
 		};
 
+		rtc: rtc@5c004000 {
+			compatible = "st,stm32mp1-rtc";
+			reg = <0x5c004000 0x400>;
+			interrupts-extended = <&exti 19 IRQ_TYPE_LEVEL_HIGH>;
+			clocks = <&clk_pclk4>, <&clk_rtc_k>;
+			clock-names = "pclk", "rtc_ck";
+			status = "disabled";
+		};
+
 		bsec: efuse@5c005000 {
 			compatible = "st,stm32mp13-bsec";
 			reg = <0x5c005000 0x400>;
@@ -277,11 +292,13 @@
 		 * Break node order to solve dependency probe issue between
 		 * pinctrl and exti.
 		 */
-		pinctrl: pin-controller@50002000 {
+		pinctrl: pinctrl@50002000 {
 			#address-cells = <1>;
 			#size-cells = <1>;
 			compatible = "st,stm32mp135-pinctrl";
 			ranges = <0 0x50002000 0x8400>;
+			interrupt-parent = <&exti>;
+			st,syscfg = <&exti 0x60 0xff>;
 			pins-are-numbered;
 
 			gpioa: gpio@50002000 {