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/mips/dts/mti,malta.dts b/arch/mips/dts/mti,malta.dts
index ef47a34..b6af1ff 100644
--- a/arch/mips/dts/mti,malta.dts
+++ b/arch/mips/dts/mti,malta.dts
@@ -26,7 +26,7 @@
 
 			clock-frequency = <1843200>;
 
-			u-boot,dm-pre-reloc;
+			bootph-all;
 		};
 	};