AFS: implement statfs

Implement the statfs() op for AFS.

Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

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

diff --cc fs/afs/afs_fs.h
Simple merge

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

diff --cc fs/afs/fsclient.c
Simple merge

diff --cc fs/afs/internal.h
Simple merge

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

diff --cc fs/afs/vnode.c
Simple merge