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/rk3328-nanopi-r2s-u-boot.dtsi b/arch/arm/dts/rk3328-nanopi-r2s-u-boot.dtsi
index 8db5e55..78d37ab 100644
--- a/arch/arm/dts/rk3328-nanopi-r2s-u-boot.dtsi
+++ b/arch/arm/dts/rk3328-nanopi-r2s-u-boot.dtsi
@@ -13,24 +13,24 @@
 };
 
 &gpio0 {
-	u-boot,dm-spl;
+	bootph-pre-ram;
 };
 
 &pinctrl {
-	u-boot,dm-spl;
+	bootph-pre-ram;
 };
 
 &sdmmc0m1_pin {
-	u-boot,dm-spl;
+	bootph-pre-ram;
 };
 
 &pcfg_pull_up_4ma {
-	u-boot,dm-spl;
+	bootph-pre-ram;
 };
 
 /* Need this and all the pinctrl/gpio stuff above to set pinmux */
 &vcc_sd {
-	u-boot,dm-spl;
+	bootph-pre-ram;
 };
 
 &gmac2io {