ARM: dts: stm32: Add bindings for ADC on AV96

Add ADC bindings to AV96 DT, the ADC inputs are present on
low-speed expansion connector X6.
Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Alexandre Torgue <alexandre.torgue@st.com>
Cc: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Cc: Maxime Coquelin <mcoquelin.stm32@gmail.com>
Cc: Patrice Chotard <patrice.chotard@st.com>
Cc: Patrick Delaunay <patrick.delaunay@st.com>
Cc: linux-stm32@st-md-mailman.stormreply.com
To: linux-arm-kernel@lists.infradead.org
Signed-off-by: Alexandre Torgue <alexandre.torgue@st.com>

arch/arm/boot/dts/stm32mp157a-avenger96.dts

@@ -128,6 +128,27 @@ wlan_pwr: regulator-wlan {
 	};
 };
 
+&adc {
+	pinctrl-names = "default";
+	pinctrl-0 = <&adc12_ain_pins_b>;
+	vdd-supply = <&vdd>;
+	vdda-supply = <&vdda>;
+	vref-supply = <&vdda>;
+	status = "okay";
+
+	adc1: adc@0 {
+		st,adc-channels = <0 1 6>;
+		st,min-sample-time-nsecs = <5000>;
+		status = "okay";
+	};
+
+	adc2: adc@100 {
+		st,adc-channels = <0 1 2>;
+		st,min-sample-time-nsecs = <5000>;
+		status = "okay";
+	};
+};
+
 &ethernet0 {
 	status = "okay";
 	pinctrl-0 = <&ethernet0_rgmii_pins_c>;