ARM: dts: imxrt1020-evk: move all u-boot, dm-spl to imxrt1020-evk-u-boot.dtsi file

At the moment a lot of u-boot,dm-spl properties are present in board .dts
file but this is not correct since u-boot,dm-spl property is u-boot
specific and must be listed into the separate imrt1020-evk-u-boot.dtsi
file. So let's move every u-boot,dm-spl property present in
imxrt1020-evk.dts to imxrt1020-evk-u-boot.dtsi file.

Signed-off-by: Giulio Benetti <giulio.benetti@benettiengineering.com>
diff --git a/arch/arm/dts/imxrt1020-evk-u-boot.dtsi b/arch/arm/dts/imxrt1020-evk-u-boot.dtsi
index 34d19e0..121665a 100644
--- a/arch/arm/dts/imxrt1020-evk-u-boot.dtsi
+++ b/arch/arm/dts/imxrt1020-evk-u-boot.dtsi
@@ -8,8 +8,40 @@
 	chosen {
 		u-boot,dm-spl;
 	};
+
+	clocks {
+		u-boot,dm-spl;
+	};
+
+	soc {
+		u-boot,dm-spl;
+	};
+};
+
+&osc {
+	u-boot,dm-spl;
+};
+
+&clks {
+	u-boot,dm-spl;
+};
+
+&gpio1 {
+	u-boot,dm-spl;
 };
 
+&gpio2 {
+	u-boot,dm-spl;
+};
+
+&gpio3 {
+	u-boot,dm-spl;
+};
+
+&gpio5 {
+	u-boot,dm-spl;
+};
+
 &gpt1 {
 	u-boot,dm-spl;
 };
@@ -19,6 +51,8 @@
 };
 
 &semc {
+	u-boot,dm-spl;
+
 	bank1: bank@0 {
 		u-boot,dm-spl;
 	};