dt-bindings: fix references for iio-bindings.txt

The iio-bindings.txt was converted into two files and merged
at the dt-schema git tree at:

	https://github.com/devicetree-org/dt-schema

Yet, some documents still refer to the old file. Fix their
references, in order to point to the right URL.

Fixes: dba91f82d5 ("dt-bindings:iio:iio-binding.txt Drop file as content now in dt-schema")
Acked-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Acked-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Link: https://lore.kernel.org/r/4efd81eca266ca0875d3bf9d1672097444146c69.1617972339.git.mchehab+huawei@kernel.org
Signed-off-by: Rob Herring <robh@kernel.org>

Documentation/devicetree/bindings/hwmon/ntc_thermistor.txt

@@ -32,7 +32,7 @@ Optional node properties:
 - "#thermal-sensor-cells" Used to expose itself to thermal fw.
 
 Read more about iio bindings at
-	Documentation/devicetree/bindings/iio/iio-bindings.txt
+	https://github.com/devicetree-org/dt-schema/blob/master/schemas/iio/
 
 Example:
 	ncp15wb473@0 {

Documentation/devicetree/bindings/iio/adc/ingenic,adc.yaml

@@ -14,8 +14,9 @@ description: >
   Industrial I/O subsystem bindings for ADC controller found in
   Ingenic JZ47xx SoCs.
 
-  ADC clients must use the format described in iio-bindings.txt, giving
-  a phandle and IIO specifier pair ("io-channels") to the ADC controller.
+  ADC clients must use the format described in
+  https://github.com/devicetree-org/dt-schema/blob/master/schemas/iio/iio-consumer.yaml,
+  giving a phandle and IIO specifier pair ("io-channels") to the ADC controller.
 
 properties:
   compatible:

Documentation/devicetree/bindings/input/adc-joystick.yaml

@@ -24,7 +24,9 @@ properties:
     description: >
       List of phandle and IIO specifier pairs.
       Each pair defines one ADC channel to which a joystick axis is connected.
-      See Documentation/devicetree/bindings/iio/iio-bindings.txt for details.
+      See
+      https://github.com/devicetree-org/dt-schema/blob/master/schemas/iio/iio-consumer.yaml
+      for details.
 
   '#address-cells':
     const: 1

Documentation/devicetree/bindings/input/touchscreen/resistive-adc-touch.txt

@@ -5,7 +5,10 @@ Required properties:
  - compatible: must be "resistive-adc-touch"
 The device must be connected to an ADC device that provides channels for
 position measurement and optional pressure.
-Refer to Documentation/devicetree/bindings/iio/iio-bindings.txt for details
+Refer to
+https://github.com/devicetree-org/dt-schema/blob/master/schemas/iio/iio-consumer.yaml
+for details
+
  - iio-channels: must have at least two channels connected to an ADC device.
 These should correspond to the channels exposed by the ADC device and should
 have the right index as the ADC device registers them. These channels

Documentation/devicetree/bindings/mfd/ab8500.txt

@@ -72,7 +72,9 @@ Required child device properties:
                                                pwm|regulator|rtc|sysctrl|usb]";
 
   A few child devices require ADC channels from the GPADC node. Those follow the
-  standard bindings from iio/iio-bindings.txt and iio/adc/adc.txt
+  standard bindings from
+  https://github.com/devicetree-org/dt-schema/blob/master/schemas/iio/iio-consumer.yaml
+  and Documentation/devicetree/bindings/iio/adc/adc.yaml
 
   abx500-temp		 : io-channels "aux1" and "aux2" for measuring external
 			   temperatures.