ceph: specify supported features in super.h

Specify the supported/required feature bits in super.h client code instead
of using the definitions from the shared kernel/userspace headers (which
will go away shortly).

Signed-off-by: Sage Weil <sage@newdream.net>

diff --cc fs/ceph/messenger.c
Simple merge

diff --cc fs/ceph/super.h
Simple merge