Documentation: charger: max14577: Update the date of introducing ABI

Update the date of introducing max14577 charger's ABI (fast_charge_timer
sysfs entry) to approximate date of kernel release which actually
introduces this.

The old date came from previous driver submissions.

Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Signed-off-by: Sebastian Reichel <sre@kernel.org>

Documentation/ABI/testing/sysfs-class-power

@@ -20,7 +20,7 @@ Description:
 		amended over time.
 
 What:		/sys/class/power_supply/max14577-charger/device/fast_charge_timer
-Date:		July 2014
+Date:		October 2014
 KernelVersion:	3.18.0
 Contact:	Krzysztof Kozlowski <k.kozlowski@samsung.com>
 Description: