fs/efs: add pr_fmt / use __func__

Also uniformize function arguments.

Signed-off-by: Fabian Frederick <fabf@skynet.be>
Cc: Joe Perches <joe@perches.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --cc fs/efs/dir.c
Simple merge

diff --cc fs/efs/efs.h
Simple merge

diff --cc fs/efs/file.c
Simple merge

diff --cc fs/efs/inode.c
Simple merge

diff --cc fs/efs/namei.c
Simple merge

diff --cc fs/efs/super.c
Simple merge