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: Jean-Jacques Hiblot <jjhiblot@ti.com>
diff --git a/drivers/usb/host/dwc3-of-simple.c b/drivers/usb/host/dwc3-of-simple.c
index 54a5f60..abc3928 100644
--- a/drivers/usb/host/dwc3-of-simple.c
+++ b/drivers/usb/host/dwc3-of-simple.c
@@ -95,6 +95,7 @@
 
 static const struct udevice_id dwc3_of_simple_ids[] = {
 	{ .compatible = "amlogic,meson-gxl-dwc3" },
+	{ .compatible = "ti,dwc3" },
 	{ }
 };