MIPS: JZ4780: dts: Fix watchdog node

- The previous node requested a memory area of 0x100 bytes, while the
  driver only manipulates four registers present in the first 0x10 bytes.

- The driver requests for the "rtc" clock, but the previous node did not
  provide any.
Signed-off-by: Paul Cercueil <paul@crapouillou.net>
Reviewed-by: Mathieu Malaterre <malat@debian.org>
Acked-by: James Hogan <jhogan@kernel.org>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Rob Herring <robh+dt@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Guenter Roeck <linux@roeck-us.net>
Cc: Wim Van Sebroeck <wim@linux-watchdog.org>
Cc: Mathieu Malaterre <malat@debian.org>
Cc: linux-mips@linux-mips.org
Cc: devicetree@vger.kernel.org
Cc: linux-watchdog@vger.kernel.org
Signed-off-by: James Hogan <jhogan@kernel.org>

Documentation/devicetree/bindings/watchdog/ingenic,jz4740-wdt.txt

@@ -3,10 +3,15 @@ Ingenic Watchdog Timer (WDT) Controller for JZ4740 & JZ4780
 Required properties:
 compatible: "ingenic,jz4740-watchdog" or "ingenic,jz4780-watchdog"
 reg: Register address and length for watchdog registers
+clocks: phandle to the RTC clock
+clock-names: should be "rtc"
 
 Example:
 
 watchdog: jz4740-watchdog@10002000 {
 	compatible = "ingenic,jz4740-watchdog";
-	reg = <0x10002000 0x100>;
+	reg = <0x10002000 0x10>;
+
+	clocks = <&cgu JZ4740_CLK_RTC>;
+	clock-names = "rtc";
 };

arch/mips/boot/dts/ingenic/jz4780.dtsi

@@ -221,7 +221,10 @@ uart4: serial@10034000 {
 
 	watchdog: watchdog@10002000 {
 		compatible = "ingenic,jz4780-watchdog";
-		reg = <0x10002000 0x100>;
+		reg = <0x10002000 0x10>;
+
+		clocks = <&cgu JZ4780_CLK_RTCLK>;
+		clock-names = "rtc";
 	};
 
 	nemc: nemc@13410000 {