boards: ronoth_lodev: Select HSI48 clock for RNG

HSI48 clock is required for entropy subystem.
Since it is not enabled by entropy driver anymore, enable it in
boards's device tree.

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

Author: erwango

boards/arm/ronoth_lodev/ronoth_lodev.dts

@@ -177,6 +177,8 @@
 };
 
 &rng {
+	clocks = <&rcc STM32_CLOCK_BUS_AHB1 0x00100000>,
+		 <&rcc STM32_SRC_HSI48 HSI48_SEL(1)>;
 	status = "okay";
 };