libceph: enable OSDMAP_ENC feature bit

Announce our support for "new" (v7 - split and separately versioned
client and osd sections) osdmap enconding.

Signed-off-by: Ilya Dryomov <ilya.dryomov@inktank.com>
Reviewed-by: Alex Elder <elder@linaro.org>

include/linux/ceph/ceph_features.h

@@ -90,6 +90,7 @@ static inline u64 ceph_sanitize_features(u64 features)
 	 CEPH_FEATURE_OSD_CACHEPOOL |		\
 	 CEPH_FEATURE_CRUSH_V2 |		\
 	 CEPH_FEATURE_EXPORT_PEER |		\
+	 CEPH_FEATURE_OSDMAP_ENC |		\
 	 CEPH_FEATURE_CRUSH_TUNABLES3)
 
 #define CEPH_FEATURES_REQUIRED_DEFAULT   \