rockchip: dts: tinker: migrate the dm-pre-reloc tag into -u-boot dts

Migrate all the "u-boot,dm-pre-reloc" tag from rk3288-tinker.dts
into rk3288-tinker-u-boot.dtsi.
When both board level and soc level '-u-boot.dtsi' files exist,
we need to include the soc level 'rk3288-u-boot.dtsi' manually.
Signed-off-by: NKever Yang <kever.yang@rock-chips.com>

arch/arm/dts/rk3288-tinker-u-boot.dtsi

+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2019 Rockchip Electronics Co., Ltd
+ */
+
+#include "rk3288-u-boot.dtsi"
+
+&pinctrl {
+	u-boot,dm-pre-reloc;
+};
+
+&uart2 {
+	u-boot,dm-pre-reloc;
+};
+
+&sdmmc {
+	u-boot,dm-pre-reloc;
+};
+
+&emmc {
+	u-boot,dm-pre-reloc;
+};
+
+&gpio3 {
+	u-boot,dm-pre-reloc;
+};
+
+&gpio8 {
+	u-boot,dm-pre-reloc;
+};

arch/arm/dts/rk3288-tinker.dts

@@ -28,8 +28,6 @@
 
 
 &pinctrl {
-	u-boot,dm-pre-reloc;
-
 	usb {
 		host_vbus_drv: host-vbus-drv {
 			rockchip,pins = <0 14 RK_FUNC_GPIO &pcfg_pull_none>;
@@ -42,7 +40,6 @@
 };
 
 &uart2 {
-	u-boot,dm-pre-reloc;
 	reg-shift = <2>;
 };
 
@@ -51,22 +48,6 @@
 	status = "okay";
 };
 
-&sdmmc {
-	u-boot,dm-pre-reloc;
-};
-
-&emmc {
-	u-boot,dm-pre-reloc;
-};
-
-&gpio3 {
-	u-boot,dm-pre-reloc;
-};
-
-&gpio8 {
-	u-boot,dm-pre-reloc;
-};
-
 &i2c2 {
     m24c08@50 {
         compatible = "at,24c08", "i2c-eeprom";