dts: arm: stih407-family: remove duplicated rng nodes

the 2 rng nodes are duplicated within the stih407-family.dtsi
Signed-off-by: Alain Volmat <avolmat@me.com>
Reviewed-by: Patrice Chotard <patrice.chotard@st.com>
Signed-off-by: Patrice Chotard <patrice.chotard@st.com>

arch/arm/boot/dts/stih407-family.dtsi

@@ -767,20 +767,6 @@ ethernet0: dwmac@9630000 {
 				 <&clk_s_c0_flexgen CLK_ETH_PHY>;
 		};
 
-		rng10: rng@8a89000 {
-			compatible      = "st,rng";
-			reg		= <0x08a89000 0x1000>;
-			clocks          = <&clk_sysin>;
-			status		= "okay";
-		};
-
-		rng11: rng@8a8a000 {
-			compatible      = "st,rng";
-			reg		= <0x08a8a000 0x1000>;
-			clocks          = <&clk_sysin>;
-			status		= "okay";
-		};
-
 		mailbox0: mailbox@8f00000  {
 			compatible	= "st,stih407-mailbox";
 			reg		= <0x8f00000 0x1000>;