mfd: arizona: Remove bindings covered in new subsystem specific docs

Binding documentation has been added in new subsystem specific binding
documents. This patch removes the now duplicate documentation from the
MFD documentation.
Signed-off-by: Charles Keepax <ckeepax@opensource.wolfsonmicro.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>

Documentation/devicetree/bindings/mfd/arizona.txt

@@ -44,7 +44,6 @@ Required properties:
 Optional properties:
 
   - wlf,reset : GPIO specifier for the GPIO controlling /RESET
-  - wlf,ldoena : GPIO specifier for the GPIO controlling LDOENA
 
   - wlf,gpio-defaults : A list of GPIO configuration register values. Defines
     for the appropriate values can found in <dt-bindings/mfd/arizona.txt>. If
@@ -67,21 +66,13 @@ Optional properties:
     present, the number of values should be less than or equal to the
     number of inputs, unspecified inputs will use the chip default.
 
-  - wlf,hpdet-channel : Headphone detection channel.
-    ARIZONA_ACCDET_MODE_HPL or 1 - Headphone detect mode is set to HPDETL
-    ARIZONA_ACCDET_MODE_HPR or 2 - Headphone detect mode is set to HPDETR
-    If this node is not mentioned or if the value is unknown, then
-    headphone detection mode is set to HPDETL.
-
   - DCVDD-supply, MICVDD-supply : Power supplies, only need to be specified if
     they are being externally supplied. As covered in
     Documentation/devicetree/bindings/regulator/regulator.txt
 
-Optional subnodes:
-  - ldo1 : Initial data for the LDO1 regulator, as covered in
-    Documentation/devicetree/bindings/regulator/regulator.txt
-  - micvdd : Initial data for the MICVDD regulator, as covered in
-    Documentation/devicetree/bindings/regulator/regulator.txt
+Also see child specific device properties:
+  Regulator - ../regulator/arizona-regulator.txt
+  Extcon    - ../extcon/extcon-arizona.txt
 
 Example: