verdin-am62: add DFU, USB and UUU fastboot support

Enable USB host as well as USB gadget and DFU support for a53 and r5
configs. Also, enable UUU fastboot support to download files with
the UUU tool from a53.

Additionally, configure usb0 to peripheral mode and add extra
environment for DFU use.

Signed-off-by: Vitor Soares <vitor.soares@toradex.com>
Reviewed-by: Francesco Dolcini <francesco.dolcini@toradex.com>
diff --git a/arch/arm/dts/k3-am625-verdin-wifi-dev-u-boot.dtsi b/arch/arm/dts/k3-am625-verdin-wifi-dev-u-boot.dtsi
index 9ecb305..b3d237c 100644
--- a/arch/arm/dts/k3-am625-verdin-wifi-dev-u-boot.dtsi
+++ b/arch/arm/dts/k3-am625-verdin-wifi-dev-u-boot.dtsi
@@ -173,6 +173,17 @@
 	status = "disabled";
 };
 
+&usb0 {
+	dr_mode = "peripheral";
+	/* Since role switching is not supported in U-Boot */
+	/delete-property/ extcon;
+	bootph-pre-ram;
+};
+
+&usbss0 {
+	bootph-pre-ram;
+};
+
 /* Verdin UART_2 */
 &wkup_uart0 {
 	bootph-all;