aoe: remove do-nothing NAME="%k" term from example udev rules

When the example udev rules in the documentation are used without
modification, warnings like the one shown below appear in the system logs:

  /var/log/messages:Aug 22 11:09:11 kung udevd[445]: NAME="%k" \
    is superfluous and breaks kernel supplied names, please remove \
    it from /etc/udev/rules.d/60-aoe.rules:26

Removing the term does not cause any problems with the creation of the
special character and block device nodes.
Signed-off-by: Ed Cashin <ecashin@coraid.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

Documentation/aoe/udev.txt

@@ -23,4 +23,4 @@ SUBSYSTEM=="aoe", KERNEL=="revalidate",	NAME="etherd/%k", GROUP="disk", MODE="02
 SUBSYSTEM=="aoe", KERNEL=="flush",	NAME="etherd/%k", GROUP="disk", MODE="0220"
 
 # aoe block devices     
-KERNEL=="etherd*",       NAME="%k", GROUP="disk"
+KERNEL=="etherd*",       GROUP="disk"