ARM: dts: am437x-gp-evm: enable ADC1

ADC0 and ADC1 pins are available on external connector J22.

Enable ADC1 which was missing.

Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

arch/arm/boot/dts/am437x-gp-evm.dts

@@ -775,6 +775,14 @@
 	};
 };
 
+&magadc {
+	status = "okay";
+
+	adc {
+		ti,adc-channels = <0 1 2 3 4 5 6 7>;
+	};
+};
+
 &ecap0 {
 	status = "okay";
 	pinctrl-names = "default";