greybus: Documentation: Fix N-svc directory name

endo_id was present in place of the directory N-svc, fix it.

Fixes: 4f7b1833e78f ("Documentation/sysfs-bus-greybus: update the bus ABI documentation")
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Reviewed-by: Johan Hovold <johan@hovoldconsulting.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>

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

@@ -6,7 +6,7 @@ Description:
 		The "root" greybus device for the Greybus device tree, or bus,
 		where N is a dynamically assigned 1-based id.
 
-What:		/sys/bus/greybus/device/N-svc/endo_id
+What:		/sys/bus/greybus/device/N-svc
 Date:		October 2015
 KernelVersion:	4.XX
 Contact:	Greg Kroah-Hartman <greg@kroah.com>