LoongArch: dts: Minor whitespace cleanup

The DTS code coding style expects exactly one space before '{'
character.
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>

arch/loongarch/boot/dts/loongson-2k0500-ref.dts

@@ -60,7 +60,7 @@ &i2c0 {
 
 	#address-cells = <1>;
 	#size-cells = <0>;
-	eeprom@57{
+	eeprom@57 {
 		compatible = "atmel,24c16";
 		reg = <0x57>;
 		pagesize = <16>;

arch/loongarch/boot/dts/loongson-2k1000-ref.dts

@@ -78,7 +78,7 @@ &i2c2 {
 
 	#address-cells = <1>;
 	#size-cells = <0>;
-	eeprom@57{
+	eeprom@57 {
 		compatible = "atmel,24c16";
 		reg = <0x57>;
 		pagesize = <16>;