mips: dts: ingenic: x1000: Add PWM device tree node

Copied from the jz4740 devicetree and trimmed to 5 timers, which
is what the hardware supports.
Signed-off-by: Aidan MacDonald <aidanmacdonald.0x0@gmail.com>
Tested-by: 周琰杰 (Zhou Yanjie) <zhouyanjie@wanyeetech.com>
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>

arch/mips/boot/dts/ingenic/x1000.dtsi

@@ -127,6 +127,18 @@ wdt: watchdog@0 {
 			clocks = <&tcu TCU_CLK_WDT>;
 			clock-names = "wdt";
 		};
+
+		pwm: pwm@40 {
+			compatible = "ingenic,x1000-pwm";
+			reg = <0x40 0x50>;
+
+			#pwm-cells = <3>;
+
+			clocks = <&tcu TCU_CLK_TIMER0>, <&tcu TCU_CLK_TIMER1>,
+				 <&tcu TCU_CLK_TIMER2>, <&tcu TCU_CLK_TIMER3>,
+				 <&tcu TCU_CLK_TIMER4>;
+			clock-names = "timer0", "timer1", "timer2", "timer3", "timer4";
+		};
 	};
 
 	rtc: rtc@10003000 {