dm: dts: Convert driver model tags to use new schema

Now that Linux has accepted these tags, move the device tree files in
U-Boot over to use them.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/arch/arm/dts/dra72-evm-u-boot.dtsi b/arch/arm/dts/dra72-evm-u-boot.dtsi
index 6c868f7..91a3b6b 100644
--- a/arch/arm/dts/dra72-evm-u-boot.dtsi
+++ b/arch/arm/dts/dra72-evm-u-boot.dtsi
@@ -6,18 +6,18 @@
 #include "omap5-u-boot.dtsi"
 
 &omap_dwc3_1 {
-	u-boot,dm-spl;
+	bootph-pre-ram;
 };
 
 &usb1 {
-	u-boot,dm-spl;
+	bootph-pre-ram;
 	dr_mode = "peripheral";
 };
 
 &usb2_phy1 {
-	u-boot,dm-spl;
+	bootph-pre-ram;
 };
 
 &usb3_phy1 {
-	u-boot,dm-spl;
+	bootph-pre-ram;
 };