dt-binding: mfd: as3722: Correct macro name

The macro name for enable3 pin is named as AS3722_EXT_CONTROL_PIN_ENABLE2
which is conflict with the enable2 pin.

Correct this macro name to correctly reflect the enable pin i.e.
AS3722_EXT_CONTROL_PIN_ENABLE3.
Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
Reported-by: Dan Willemsen <dwillemsen@nvidia.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>

include/dt-bindings/mfd/as3722.h

@@ -13,7 +13,7 @@
 /* External control pins */
 #define AS3722_EXT_CONTROL_PIN_ENABLE1 1
 #define AS3722_EXT_CONTROL_PIN_ENABLE2 2
-#define AS3722_EXT_CONTROL_PIN_ENABLE2 3
+#define AS3722_EXT_CONTROL_PIN_ENABLE3 3
 
 /* Interrupt numbers for AS3722 */
 #define AS3722_IRQ_LID			0