ARM: dts: STiH407-pinctrl: Add pinctrl_rgmii1_mdio_1 node

On 96board, we can't reuse rgmii1-mdio as the pin pio1 3
( mdint ) is dedicated for user led green 1. So create
rgmii1_mdio_1 for 96board on which only mdio and mdc pins
are useful.
Signed-off-by: Patrice Chotard <patrice.chotard@st.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Reviewed-by: Peter Griffin <peter.griffin@linaro.org>

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

@@ -230,6 +230,13 @@ st,pins {
 					};
 				};
 
+				pinctrl_rgmii1_mdio_1: rgmii1-mdio-1 {
+					st,pins {
+						mdio = <&pio1 0 ALT1 OUT BYPASS 0>;
+						mdc = <&pio1 1 ALT1 OUT NICLK 0 CLK_A>;
+					};
+				};
+
 				pinctrl_mii1: mii1 {
 					st,pins {
 						txd0 = <&pio0 0 ALT1 OUT SE_NICLK_IO 0 CLK_A>;