usb: dwc3-of-simple: Add support for DRA7/AM57 platforms.

Add the compatibility with "ti,dwc3" and enable it by default if DM_USB
is enabled.
Signed-off-by: NJean-Jacques Hiblot <jjhiblot@ti.com>

drivers/usb/host/Kconfig

@@ -24,6 +24,7 @@ config USB_XHCI_DWC3
 config USB_XHCI_DWC3_OF_SIMPLE
 	bool "DesignWare USB3 DRD Generic OF Simple Glue Layer"
 	depends on DM_USB
+	default y if DRA7XX
 	help
 	  Support USB2/3 functionality in simple SoC integrations with
 	  USB controller based on the DesignWare USB3 IP Core.

drivers/usb/host/dwc3-of-simple.c

@@ -95,6 +95,7 @@ static int dwc3_of_simple_remove(struct udevice *dev)
 
 static const struct udevice_id dwc3_of_simple_ids[] = {
 	{ .compatible = "amlogic,meson-gxl-dwc3" },
+	{ .compatible = "ti,dwc3" },
 	{ }
 };