ARM: DT: STiH407: Add pinconfig for IRB UHF and IRB TX

This patch adds the pinconfig for IRB TX and IRB UHF.

Signed-off-by: M'boumba Cedric Madianga <cedric.madianga@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

@@ -121,6 +121,24 @@
 						ir = <&pio4 0 ALT2 IN>;
 					};
 				};
+
+				pinctrl_uhf: uhf0 {
+					st,pins {
+						ir = <&pio4 1 ALT2 IN>;
+					};
+				};
+
+				pinctrl_tx: tx0 {
+					st,pins {
+						tx = <&pio4 2 ALT2 OUT>;
+					};
+				};
+
+				pinctrl_tx_od: tx_od0 {
+					st,pins {
+						tx_od = <&pio4 3 ALT2 OUT>;
+					};
+				};
 			};
 
 			/* SBC_ASC0 - UART10 */