ARM: dts: sam9x60: use u-boot,dm-pre-reloc

Use u-boot,dm-pre-reloc for slow xtal and main xtal.
Signed-off-by: NClaudiu Beznea <claudiu.beznea@microchip.com>

arch/arm/dts/sam9x60ek-u-boot.dtsi

@@ -27,6 +27,10 @@
 	u-boot,dm-pre-reloc;
 };
 
+&slow_xtal {
+	u-boot,dm-pre-reloc;
+};
+
 &dbgu {
 	u-boot,dm-pre-reloc;
 };
@@ -67,6 +71,10 @@
 	u-boot,dm-pre-reloc;
 };
 
+&main_xtal {
+	u-boot,dm-pre-reloc;
+};
+
 &mck {
 	u-boot,dm-pre-reloc;
 };