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/imx8mp-msc-sm2s-u-boot.dtsi b/arch/arm/dts/imx8mp-msc-sm2s-u-boot.dtsi
index cf591ad..c398a74 100644
--- a/arch/arm/dts/imx8mp-msc-sm2s-u-boot.dtsi
+++ b/arch/arm/dts/imx8mp-msc-sm2s-u-boot.dtsi
@@ -12,54 +12,54 @@
 	wdt-reboot {
 		compatible = "wdt-reboot";
 		wdt = <&wdog1>;
-		u-boot,dm-spl;
+		bootph-pre-ram;
 	};
 };
 
 &reg_usdhc2_vmmc {
-	u-boot,dm-spl;
+	bootph-pre-ram;
 };
 
 &gpio1 {
-	u-boot,dm-spl;
+	bootph-pre-ram;
 };
 
 &gpio2 {
-	u-boot,dm-spl;
+	bootph-pre-ram;
 };
 
 &gpio3 {
-	u-boot,dm-spl;
+	bootph-pre-ram;
 };
 
 &i2c1 {
-	u-boot,dm-spl;
+	bootph-pre-ram;
 };
 
 &i2c2 {
-	u-boot,dm-spl;
+	bootph-pre-ram;
 };
 
 &i2c3 {
-	u-boot,dm-spl;
+	bootph-pre-ram;
 };
 
 &i2c4 {
-	u-boot,dm-spl;
+	bootph-pre-ram;
 };
 
 &i2c5 {
-	u-boot,dm-spl;
+	bootph-pre-ram;
 };
 
 &i2c6 {
-	u-boot,dm-spl;
+	bootph-pre-ram;
 };
 
 &pinctrl_i2c6 {
-	u-boot,dm-spl;
+	bootph-pre-ram;
 };
 
 &pmic {
-	u-boot,dm-spl;
+	bootph-pre-ram;
 };