add a few overlays

nrf5340_audio_dk_nrf5340_cpuapp.overlay

@@ -0,0 +1,18 @@
+// To get started, press Ctrl+Space to bring up the completion menu and view the available nodes.
+
+// You can also use the buttons in the sidebar to perform actions on nodes.
+// Actions currently available include:
+
+// * Enabling / disabling the node
+// * Adding the bus to a bus
+// * Removing the node
+// * Connecting ADC channels
+
+// For more help, browse the DeviceTree documentation at https://docs.zephyrproject.org/latest/guides/dts/index.html
+// You can also visit the nRF DeviceTree extension documentation at https://docs.nordicsemi.com/bundle/nrf-connect-vscode/page/guides/ncs_configure_app.html#devicetree-support-in-the-extension
+
+&uart0_default {
+	group1 {
+		psels = <NRF_PSEL(UART_TX, 0, 11)>, <NRF_PSEL(UART_RTS, 1, 7)>;
+	};
+};