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/at91sam9n12ek.dts b/arch/arm/dts/at91sam9n12ek.dts
index 64a7abf..67578b5 100644
--- a/arch/arm/dts/at91sam9n12ek.dts
+++ b/arch/arm/dts/at91sam9n12ek.dts
@@ -16,7 +16,7 @@
 	chosen {
 		bootargs = "root=/dev/mtdblock1 rw rootfstype=jffs2";
 		stdout-path = "serial0:115200n8";
-		u-boot,dm-pre-reloc;
+		bootph-all;
 	};
 
 	memory {
@@ -36,7 +36,7 @@
 	ahb {
 		apb {
 			dbgu: serial@fffff200 {
-				u-boot,dm-pre-reloc;
+				bootph-all;
 				status = "okay";
 			};