ARM: dts: stm32: add USB OTG pinctrl to stm32mp15

Add pinctrl definition for USB High-Speed OTG ID pin and USB Full-Speed OTG
DP and DM lines that can be used on stm32mp15.
Signed-off-by: Amelie Delaunay <amelie.delaunay@st.com>
Signed-off-by: Alexandre Torgue <alexandre.torgue@st.com>

arch/arm/boot/dts/stm32mp15-pinctrl.dtsi

@@ -1120,6 +1120,19 @@ pins2 {
 			bias-disable;
 		};
 	};
+
+	usbotg_hs_pins_a: usbotg-hs-0 {
+		pins {
+			pinmux = <STM32_PINMUX('A', 10, ANALOG)>; /* OTG_ID */
+		};
+	};
+
+	usbotg_fs_dp_dm_pins_a: usbotg-fs-dp-dm-0 {
+		pins {
+			pinmux = <STM32_PINMUX('A', 11, ANALOG)>, /* OTG_FS_DM */
+				 <STM32_PINMUX('A', 12, ANALOG)>; /* OTG_FS_DP */
+		};
+	};
 };
 
 &pinctrl_z {