Fixed some checkpatch warnings.

tj: adapted to wq/for-3.7 and massaged pr_xxx() format strings a bit.
Signed-off-by: NValentin Ilie <valentin.ilie@gmail.com>
Signed-off-by: NTejun Heo <tj@kernel.org>
LKML-Reference: <1345326762-21747-1-git-send-email-valentin.ilie@gmail.com>