greybus: Documentation/sysfs: sort entries alphabetically

The attribute entries have been kept mostly sorted within each device
type. Let's move the three more-recently added interface attributes
that were not.

Suggested-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Johan Hovold <johan@hovoldconsulting.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>

drivers/staging/greybus/Documentation/sysfs-bus-greybus

@@ -14,6 +14,13 @@ Description:
 		An Interface I on the bus N, where I is the 1-byte interface
 		ID.
 
+What:		/sys/bus/greybus/device/N-I/current_now
+Date:		March 2016
+KernelVersion:	4.XX
+Contact:	Greg Kroah-Hartman <greg@kroah.com>
+Description:
+		Current measurement of the interface in microamps (uA)
+
 What:		/sys/bus/greybus/device/N-I/ddbl1_manufacturer_id
 Date:		October 2015
 KernelVersion:	4.XX
@@ -37,13 +44,12 @@ Contact:	Greg Kroah-Hartman <greg@kroah.com>
 Description:
 		The ID of a Greybus interface.
 
-What:		/sys/bus/greybus/device/N-I/serial_number
-Date:		October 2015
+What:		/sys/bus/greybus/device/N-I/power_now
+Date:		March 2016
 KernelVersion:	4.XX
 Contact:	Greg Kroah-Hartman <greg@kroah.com>
 Description:
-		Serial Number of the Greybus interface, represented by a 64 bit
-		hexadecimal number.
+		Power measurement of the interface in microwatts (uW)
 
 What:		/sys/bus/greybus/device/N-I/product_id
 Date:		October 2015
@@ -52,6 +58,14 @@ Contact:	Greg Kroah-Hartman <greg@kroah.com>
 Description:
 		Product ID of a Greybus interface.
 
+What:		/sys/bus/greybus/device/N-I/serial_number
+Date:		October 2015
+KernelVersion:	4.XX
+Contact:	Greg Kroah-Hartman <greg@kroah.com>
+Description:
+		Serial Number of the Greybus interface, represented by a 64 bit
+		hexadecimal number.
+
 What:		/sys/bus/greybus/device/N-I/vendor_id
 Date:		October 2015
 KernelVersion:	4.XX
@@ -74,20 +88,6 @@ Contact:	Greg Kroah-Hartman <greg@kroah.com>
 Description:
 		Voltage measurement of the interface in microvolts (uV)
 
-What:		/sys/bus/greybus/device/N-I/current_now
-Date:		March 2016
-KernelVersion:	4.XX
-Contact:	Greg Kroah-Hartman <greg@kroah.com>
-Description:
-		Current measurement of the interface in microamps (uA)
-
-What:		/sys/bus/greybus/device/N-I/power_now
-Date:		March 2016
-KernelVersion:	4.XX
-Contact:	Greg Kroah-Hartman <greg@kroah.com>
-Description:
-		Power measurement of the interface in microwatts (uW)
-
 What:		/sys/bus/greybus/device/N-I.ctrl
 Date:		October 2015
 KernelVersion:	4.XX