arm: kirkwood: readynas duo v2: Add GMT G762 Fan Controller

Now that GMT G762 PWM Fan Controller is available upstream, let's add
missing bindings in Netgear ReadyNAS Duo v2 .dts file.
Signed-off-by: Arnaud Ebalard <arno@natisbad.org>
Signed-off-by: Jason Cooper <jason@lakedaemon.net>

arch/arm/boot/dts/kirkwood-netgear_readynas_duo_v2.dts

@@ -52,6 +52,17 @@ pmx_led_blue_backup: pmx-led-blue-backup {
 			};
 		};
 
+		clocks {
+		       #address-cells = <1>;
+		       #size-cells = <0>;
+
+		       g762_clk: fixedclk {
+				 compatible = "fixed-clock";
+				 #clock-cells = <0>;
+				 clock-frequency = <8192>;
+		       };
+		};
+
 		i2c@11000 {
 			status = "okay";
 
@@ -59,6 +70,15 @@ rs5c372a: rs5c372a@32 {
 				compatible = "ricoh,rs5c372a";
 				reg = <0x32>;
 			};
+
+			g762: g762@3e {
+				compatible = "gmt,g762";
+				reg = <0x3e>;
+				clocks = <&g762_clk>; /* input clock */
+				fan_gear_mode = <0>;
+				fan_startv = <1>;
+				pwm_polarity = <0>;
+			};
 		};
 
 		serial@12000 {