The Microchip Analog to Digital Converter (ADC) Device Tree binding
documents compatible strings with no vendor prefix. Since it should
compatible strings with also a vendor, add these to the binding doc
and mark the old ones as deprecated.

The driver says that the device is from Microchip Technology which
is listed in Documentation/devicetree/bindings/vendor-prefixes.txt
so use the documented prefix.

Signed-off-by: Javier Martinez Canillas <jav...@osg.samsung.com>
---

 .../devicetree/bindings/iio/adc/mcp320x.txt        | 30 +++++++++++++++-------
 1 file changed, 21 insertions(+), 9 deletions(-)

diff --git a/Documentation/devicetree/bindings/iio/adc/mcp320x.txt 
b/Documentation/devicetree/bindings/iio/adc/mcp320x.txt
index 2a1f3af30155..bcd3ac8e6e0c 100644
--- a/Documentation/devicetree/bindings/iio/adc/mcp320x.txt
+++ b/Documentation/devicetree/bindings/iio/adc/mcp320x.txt
@@ -10,16 +10,28 @@ must be specified.
 Required properties:
        - compatible:   Must be one of the following, depending on the
                        model:
-                               "mcp3001"
-                               "mcp3002"
-                               "mcp3004"
-                               "mcp3008"
-                               "mcp3201"
-                               "mcp3202"
-                               "mcp3204"
-                               "mcp3208"
-                               "mcp3301"
+                               "mcp3001" (DEPRECATED)
+                               "mcp3002" (DEPRECATED)
+                               "mcp3004" (DEPRECATED)
+                               "mcp3008" (DEPRECATED)
+                               "mcp3201" (DEPRECATED)
+                               "mcp3202" (DEPRECATED)
+                               "mcp3204" (DEPRECATED)
+                               "mcp3208" (DEPRECATED)
+                               "mcp3301" (DEPRECATED)
 
+                               "microchip,mcp3001"
+                               "microchip,mcp3002"
+                               "microchip,mcp3004"
+                               "microchip,mcp3008"
+                               "microchip,mcp3201"
+                               "microchip,mcp3202"
+                               "microchip,mcp3204"
+                               "microchip,mcp3208"
+                               "microchip,mcp3301"
+
+                       NOTE: The use of the compatibles with no vendor prefix
+                       is deprecated and only listed because old DT use them.
 
 Examples:
 spi_controller {
-- 
2.4.3

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