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/dm8168-evm-u-boot.dtsi b/arch/arm/dts/dm8168-evm-u-boot.dtsi
index de0bb9b..f939df2 100644
--- a/arch/arm/dts/dm8168-evm-u-boot.dtsi
+++ b/arch/arm/dts/dm8168-evm-u-boot.dtsi
@@ -7,6 +7,6 @@
 
 / {
 	ocp {
-		u-boot,dm-pre-reloc;
+		bootph-all;
 	};
 };