MIPS: Loongson64: DTS: Add RTC support to Loongson-2K1000

The module is now supported, enable it.

Acked-by: Jiaxun Yang <[e-mail]>
Signed-off-by: Binbin Zhou <[e-mail]>
Signed-off-by: WANG Xuerui <[e-mail]>
Signed-off-by: Thomas Bogendoerfer <[e-mail]>

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

···
 						<0x00000000>; /* int3 */
 		};
 
+		rtc0: rtc@1fe07800 {
+			compatible = "loongson,ls2k1000-rtc";
+			reg = <0 0x1fe07800 0 0x78>;
+			interrupt-parent = <&liointc0>;
+			interrupts = <60 IRQ_TYPE_LEVEL_LOW>;
+		};
+
 		uart0: serial@1fe00000 {
 			compatible = "ns16550a";
 			reg = <0 0x1fe00000 0 0x8>;