libceph: all features fields must be u64

In preparation for ceph_features.h update, change all features fields
from unsigned int/u32 to u64.  (ceph.git has ~40 feature bits at this
point.)

Signed-off-by: Ilya Dryomov <ilya.dryomov@inktank.com>
Reviewed-by: Sage Weil <sage@inktank.com>

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

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

diff --cc include/linux/ceph/libceph.h
Simple merge

diff --cc include/linux/ceph/messenger.h
Simple merge

diff --cc net/ceph/ceph_common.c
Simple merge

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