ARM: dts: sti: disable rng11 on the stih418 platform

The rng11 is not available on the STiH418 hence is disabled in the
stih418.dtsi

Signed-off-by: Alain Volmat <[e-mail]>
Reviewed-by: Patrice Chotard <[e-mail]>
Signed-off-by: Patrice Chotard <[e-mail]>

arch/arm/boot/dts/stih418.dtsi

···
 	};
 
 	soc {
+		rng11: rng@8a8a000 {
+			status = "disabled";
+		};
+
 		usb2_picophy1: phy2@0 {
 			compatible = "st,stih407-usb2-phy";
 			reg = <0 0>;