xfs: refactor log recovery check

Add a predicate to decide if the log is actively in recovery and use
that instead of open-coding a pagf_init check in the attr leaf verifier.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Brian Foster <bfoster@redhat.com>
Reviewed-by: Carlos Maiolino <cmaiolino@redhat.com>

fs/xfs/xfs_log.c

@@ -4104,3 +4104,12 @@ xfs_log_check_lsn(
 
 	return valid;
 }
+
+bool
+xfs_log_in_recovery(
+	struct xfs_mount	*mp)
+{
+	struct xlog		*log = mp->m_log;
+
+	return log->l_flags & XLOG_ACTIVE_RECOVERY;
+}