dts: arm: st: stm32h7 with dual core have flash clock enable bit

Define the "clocks" property, for the flash "st,stm32h7-flash-controller"
node, only for the stm32H7 dual-core devices
which have the RCC bit 8 present in their RCC AHB3 register.

Signed-off-by: Francois Ramu <[email protected]>

Author: FRASTM

dts/arm/st/h7/stm32h7.dtsi

@@ -144,7 +144,6 @@
 			compatible = "st,stm32-flash-controller", "st,stm32h7-flash-controller";
 			reg = <0x52002000 0x400>;
 			interrupts = <4 0>;
-			clocks = <&rcc STM32_CLOCK(AHB3, 8U)>;
 
 			#address-cells = <1>;
 			#size-cells = <1>;

dts/arm/st/h7/stm32h7_dualcore.dtsi

@@ -25,3 +25,7 @@
 		};
 	};
 };
+
+&flash {
+	clocks = <&rcc STM32_CLOCK(AHB3, 8U)>;
+};