cifs: minor simplification to smb2_is_network_name_deleted

Trivial change to clarify code in smb2_is_network_name_deleted
Suggested-by: Pavel Shilovsky <pshilov@microsoft.com>
Reviewed-by: Pavel Shilovsky <pshilov@microsoft.com>
Reviewed-by: Shyam Prasad N <sprasad@microsoft.com>
Signed-off-by: Steve French <stfrench@microsoft.com>

fs/cifs/smb2ops.c

@@ -2459,7 +2459,9 @@ smb2_is_network_name_deleted(char *buf, struct TCP_Server_Info *server)
 	struct cifs_ses *ses;
 	struct cifs_tcon *tcon;
 
-	if (shdr->Status == STATUS_NETWORK_NAME_DELETED) {
+	if (shdr->Status != STATUS_NETWORK_NAME_DELETED)
+		return;
+
 	spin_lock(&cifs_tcp_ses_lock);
 	list_for_each(tmp, &server->smb_ses_list) {
 		ses = list_entry(tmp, struct cifs_ses, smb_ses_list);
@@ -2475,7 +2477,6 @@ smb2_is_network_name_deleted(char *buf, struct TCP_Server_Info *server)
 		}
 	}
 	spin_unlock(&cifs_tcp_ses_lock);
-	}
 }
 
 static int