arm64: dts: ti: phycore-am64: Add ADC

Add the ADC node to the phyCORE AM64x and enable the ADC.
Signed-off-by: Nathan Morrisson <nmorrisson@phytec.com>
Reviewed-by: Wadim Egorov <w.egorov@phytec.de>
Link: https://lore.kernel.org/r/20240201001439.3259450-1-nmorrisson@phytec.comSigned-off-by: Vignesh Raghavendra <vigneshr@ti.com>

arch/arm64/boot/dts/ti/k3-am64-phycore-som.dtsi

@@ -318,3 +318,10 @@ &sdhci0 {
 	disable-wp;
 	keep-power-in-suspend;
 };
+
+&tscadc0 {
+	status = "okay";
+	adc {
+		ti,adc-channels = <0 1 2 3 4 5 6 7>;
+	};
+};