ARM: dts: stm32: fix RCC node name on stm32f429 MCU

This prevent warning observed with "make dtbs_check W=1"

Warning (simple_bus_reg): /soc/rcc@40023810: simple-bus unit address format
error, expected "40023800"
Signed-off-by: Alexandre Torgue <alexandre.torgue@foss.st.com>

arch/arm/boot/dts/stm32f429.dtsi

@@ -709,7 +709,7 @@ crc: crc@40023000 {
 			status = "disabled";
 		};
 
-		rcc: rcc@40023810 {
+		rcc: rcc@40023800 {
 			#reset-cells = <1>;
 			#clock-cells = <2>;
 			compatible = "st,stm32f42xx-rcc", "st,stm32-rcc";