libceph: support CEPH_FEATURE_EXPORT_PEER

Signed-off-by: Yan, Zheng <zheng.z.yan@intel.com>

include/linux/ceph/ceph_features.h

@@ -80,7 +80,8 @@ static inline u64 ceph_sanitize_features(u64 features)
 	 CEPH_FEATURE_CRUSH_TUNABLES2 |		\
 	 CEPH_FEATURE_REPLY_CREATE_INODE |	\
 	 CEPH_FEATURE_OSDHASHPSPOOL |		\
-	 CEPH_FEATURE_CRUSH_V2)
+	 CEPH_FEATURE_CRUSH_V2 |		\
+	 CEPH_FEATURE_EXPORT_PEER)
 
 #define CEPH_FEATURES_REQUIRED_DEFAULT   \
 	(CEPH_FEATURE_NOSRCADDR |	 \