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/riscv/dts/fu540-c000-u-boot.dtsi b/arch/riscv/dts/fu540-c000-u-boot.dtsi
index b7cd600..360679a 100644
--- a/arch/riscv/dts/fu540-c000-u-boot.dtsi
+++ b/arch/riscv/dts/fu540-c000-u-boot.dtsi
@@ -9,47 +9,47 @@
 	cpus {
 		assigned-clocks = <&prci PRCI_CLK_COREPLL>;
 		assigned-clock-rates = <1000000000>;
-		u-boot,dm-spl;
+		bootph-pre-ram;
 		cpu0: cpu@0 {
 			clocks = <&prci PRCI_CLK_COREPLL>;
-			u-boot,dm-spl;
+			bootph-pre-ram;
 			status = "okay";
 			cpu0_intc: interrupt-controller {
-				u-boot,dm-spl;
+				bootph-pre-ram;
 			};
 		};
 		cpu1: cpu@1 {
 			clocks = <&prci PRCI_CLK_COREPLL>;
-			u-boot,dm-spl;
+			bootph-pre-ram;
 			cpu1_intc: interrupt-controller {
-				u-boot,dm-spl;
+				bootph-pre-ram;
 			};
 		};
 		cpu2: cpu@2 {
 			clocks = <&prci PRCI_CLK_COREPLL>;
-			u-boot,dm-spl;
+			bootph-pre-ram;
 			cpu2_intc: interrupt-controller {
-				u-boot,dm-spl;
+				bootph-pre-ram;
 			};
 		};
 		cpu3: cpu@3 {
 			clocks = <&prci PRCI_CLK_COREPLL>;
-			u-boot,dm-spl;
+			bootph-pre-ram;
 			cpu3_intc: interrupt-controller {
-				u-boot,dm-spl;
+				bootph-pre-ram;
 			};
 		};
 		cpu4: cpu@4 {
 			clocks = <&prci PRCI_CLK_COREPLL>;
-			u-boot,dm-spl;
+			bootph-pre-ram;
 			cpu4_intc: interrupt-controller {
-				u-boot,dm-spl;
+				bootph-pre-ram;
 			};
 		};
 	};
 
 	soc {
-		u-boot,dm-spl;
+		bootph-pre-ram;
 		otp: otp@10070000 {
 			compatible = "sifive,fu540-c000-otp";
 			reg = <0x0 0x10070000 0x0 0x1000>;
@@ -63,7 +63,7 @@
 					       &cpu3_intc 3 &cpu3_intc 7
 					       &cpu4_intc 3 &cpu4_intc 7>;
 			reg = <0x0 0x2000000 0x0 0x10000>;
-			u-boot,dm-spl;
+			bootph-pre-ram;
 		};
 		prci: clock-controller@10000000 {
 			#reset-cells = <1>;
@@ -82,21 +82,21 @@
 			       0x0 0x100b8000 0x0 0x1000>;
 			clocks = <&prci PRCI_CLK_DDRPLL>;
 			clock-frequency = <933333324>;
-			u-boot,dm-spl;
+			bootph-pre-ram;
 		};
 	};
 };
 
 &prci {
-	u-boot,dm-spl;
+	bootph-pre-ram;
 };
 
 &uart0 {
-	u-boot,dm-spl;
+	bootph-pre-ram;
 };
 
 &qspi2 {
-	u-boot,dm-spl;
+	bootph-pre-ram;
 };
 
 &eth0 {