MIPS: Loongson64: DTS: Add pm block node for Loongson-2K1000

The module is now supported, enable it.

Signed-off-by: Qing Zhang <[e-mail]>
Signed-off-by: Thomas Bogendoerfer <[e-mail]>

arch/mips/boot/dts/loongson/loongson64-2k1000.dtsi

···
 			0 0x40000000 0 0x40000000 0 0x40000000
 			0xfe 0x00000000 0xfe 0x00000000 0 0x40000000>;
 
+		pm: reset-controller@1fe07000 {
+			compatible = "loongson,ls2k-pm";
+			reg = <0 0x1fe07000 0 0x422>;
+		};
+
 		liointc0: interrupt-controller@1fe11400 {
 			compatible = "loongson,liointc-2.0";
 			reg = <0 0x1fe11400 0 0x40>,