dts: stm32f7: Configure rng domain clock

Configure RNG domain clock and align it on USB (as this is the same clk).
This is not stricly required, as this configuration matches default
reset but its more consistent this way.

Signed-off-by: Erwan Gouriou <[email protected]>

Author: erwango

dts/arm/st/f7/stm32f7.dtsi

@@ -725,7 +725,8 @@
 			compatible = "st,stm32-rng";
 			reg = <0x50060800 0x400>;
 			interrupts = <80 0>;
-			clocks = <&rcc STM32_CLOCK_BUS_AHB2 0x00000040>;
+			clocks = <&rcc STM32_CLOCK_BUS_AHB2 0x00000040>,
+				 <&rcc STM32_SRC_PLL_Q CK48M_SEL(0)>;
 			status = "disabled";
 		};