ARM: DT: STiH407: Add RMII pinctrl support

This patch adds the RMII pinctrl support for the Synopsys
MAC on STiH407 SoCs.

Signed-off-by: Giuseppe Cavallaro <peppe.cavallaro@st.com>
Acked-by: Lee Jones <lee.jones@linaro.org>
Acked-by: Patrice Chotard <patrice.chotard@st.com>
Signed-off-by: Peter Griffin <peter.griffin@linaro.org>
Signed-off-by: Maxime Coquelin <maxime.coquelin@st.com>

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

@@ -256,6 +256,33 @@
 						phyclk = <&pio2 3 ALT1 OUT NICLK 0 CLK_A>;
 					};
 				};
+
+				pinctrl_rmii1: rmii1-0 {
+					st,pins {
+						txd0 = <&pio0 0 ALT1 OUT SE_NICLK_IO 0 CLK_A>;
+						txd1 = <&pio0 1 ALT1 OUT SE_NICLK_IO 0 CLK_A>;
+						txen = <&pio0 5 ALT1 OUT SE_NICLK_IO 0 CLK_A>;
+						mdio = <&pio1 0 ALT1 OUT BYPASS 0>;
+						mdc = <&pio1 1 ALT1 OUT NICLK 0 CLK_A>;
+						mdint = <&pio1 3 ALT1 IN BYPASS 0>;
+						rxd0 = <&pio1 4 ALT1 IN SE_NICLK_IO 0 CLK_B>;
+						rxd1 = <&pio1 5 ALT1 IN SE_NICLK_IO 0 CLK_B>;
+						rxdv = <&pio2 0 ALT1 IN SE_NICLK_IO 0 CLK_B>;
+						rx_er = <&pio2 1 ALT1 IN SE_NICLK_IO 0 CLK_A>;
+					};
+				};
+
+				pinctrl_rmii1_phyclk: rmii1_phyclk {
+					st,pins {
+						phyclk = <&pio2 3 ALT1 OUT NICLK 0 CLK_A>;
+					};
+				};
+
+				pinctrl_rmii1_phyclk_ext: rmii1_phyclk_ext {
+					st,pins {
+						phyclk = <&pio2 3 ALT2 IN NICLK 0 CLK_A>;
+					};
+				};
 			};
 
 			pwm1 {