arm: dts: imx8mp: Add common u-boot dtsi

Factor out the common node settings for dm-spl and dm-pre-reloc
and move them to imx8mp-u-boot.dtsi

Signed-off-by: Teresa Remmet <t.remmet@phytec.de>
Reviewed-by: Fabio Estevam <festevam@gmail.com>
Reviewed-by: Heiko Schocher <hs@denx.de>
diff --git a/arch/arm/dts/imx8mp-phyboard-pollux-rdk-u-boot.dtsi b/arch/arm/dts/imx8mp-phyboard-pollux-rdk-u-boot.dtsi
index 20e7f63..6c15289 100644
--- a/arch/arm/dts/imx8mp-phyboard-pollux-rdk-u-boot.dtsi
+++ b/arch/arm/dts/imx8mp-phyboard-pollux-rdk-u-boot.dtsi
@@ -4,6 +4,8 @@
  * Author: Teresa Remmet <t.remmet@phytec.de>
  */
 
+#include "imx8mp-u-boot.dtsi"
+
 / {
 	wdt-reboot {
 		compatible = "wdt-reboot";
@@ -12,43 +14,6 @@
 	};
 };
 
-&{/soc@0} {
-	u-boot,dm-pre-reloc;
-	u-boot,dm-spl;
-};
-
-&clk {
-	u-boot,dm-spl;
-	u-boot,dm-pre-reloc;
-};
-
-&osc_32k {
-	u-boot,dm-spl;
-	u-boot,dm-pre-reloc;
-};
-
-&osc_24m {
-	u-boot,dm-spl;
-	u-boot,dm-pre-reloc;
-};
-
-&aips1 {
-	u-boot,dm-spl;
-	u-boot,dm-pre-reloc;
-};
-
-&aips2 {
-	u-boot,dm-spl;
-};
-
-&aips3 {
-	u-boot,dm-spl;
-};
-
-&iomuxc {
-	u-boot,dm-spl;
-};
-
 &reg_usdhc2_vmmc {
 	u-boot,dm-spl;
 };