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 --git a/fs/ceph/super.c b/fs/ceph/super.c
index c6740e4..2df963f 100644
--- a/fs/ceph/super.c
+++ b/fs/ceph/super.c
@@ -490,10 +490,10 @@
 					struct ceph_options *opt)
 {
 	struct ceph_fs_client *fsc;
-	const unsigned supported_features =
+	const u64 supported_features =
 		CEPH_FEATURE_FLOCK |
 		CEPH_FEATURE_DIRLAYOUTHASH;
-	const unsigned required_features = 0;
+	const u64 required_features = 0;
 	int page_count;
 	size_t size;
 	int err = -ENOMEM;