ARM: dts: dra7: Add usb peripheral nodes in spl

Add usb peripheral and usb phy nodes in spl to enable SPL_DFU bootmode.

Signed-off-by: Faiz Abbas <faiz_abbas@ti.com>
Signed-off-by: Jean-Jacques Hiblot <jjhiblot@ti.com>
diff --git a/arch/arm/dts/dra76-evm-u-boot.dtsi b/arch/arm/dts/dra76-evm-u-boot.dtsi
index f651f40..a4dfbe7 100644
--- a/arch/arm/dts/dra76-evm-u-boot.dtsi
+++ b/arch/arm/dts/dra76-evm-u-boot.dtsi
@@ -24,3 +24,20 @@
 &mmc2_iodelay_hs200_conf {
 	u-boot,dm-spl;
 };
+
+&omap_dwc3_1 {
+	u-boot,dm-spl;
+};
+
+&usb1 {
+	u-boot,dm-spl;
+	dr_mode = "peripheral";
+};
+
+&usb2_phy1 {
+	u-boot,dm-spl;
+};
+
+&usb3_phy1 {
+	u-boot,dm-spl;
+};