nick kvfree() from apparmor

too many places open-code it

Change-Id: I007f4b663d7af564b2ce4009f5e13eeeeb82929a
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Git-commit: 39f1f78d53b9bcbca91967380c5f0f2305a5c55f
Git-repo: git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git


[jgebben@codeaurora.org: Remove redundant apparmor code not present upstream]
Signed-off-by: Jeremy Gebben <jgebben@codeaurora.org>