smb: client: stop flooding dmesg in smb2_calc_signature()

When having several mounts that share same credential and the client
couldn't re-establish an SMB session due to an expired kerberos ticket
or rotated password, smb2_calc_signature() will end up flooding dmesg
when not finding SMB sessions to calculate signatures.
Signed-off-by: Paulo Alcantara (Red Hat) <pc@manguebit.com>
Signed-off-by: Steve French <stfrench@microsoft.com>

fs/smb/client/smb2transport.c

@@ -242,7 +242,7 @@ smb2_calc_signature(struct smb_rqst *rqst, struct TCP_Server_Info *server,
 
 	ses = smb2_find_smb_ses(server, le64_to_cpu(shdr->SessionId));
 	if (unlikely(!ses)) {
-		cifs_server_dbg(VFS, "%s: Could not find session\n", __func__);
+		cifs_server_dbg(FYI, "%s: Could not find session\n", __func__);
 		return -ENOENT;
 	}