Move timer X2002 to tbf_fsm

Related: OS#2709
Change-Id: I94b71c60ed49d51ebdf6d6b428056b4b94354676
diff --git a/src/tbf_dl.h b/src/tbf_dl.h
index 9719327..ad1469a 100644
--- a/src/tbf_dl.h
+++ b/src/tbf_dl.h
@@ -71,7 +71,6 @@
 	 * variables are in both (dl and ul) structs and not outside union.
 	 */
 	int32_t m_tx_counter; /* count all transmitted blocks */
-	uint8_t m_wait_confirm; /* wait for CCCH IMM.ASS cnf */
 	bool m_dl_ack_requested;
 	int32_t m_last_dl_poll_fn;
 	int32_t m_last_dl_drained_fn;
@@ -153,6 +152,7 @@
 		  const uint8_t egprs_ms_class, const uint16_t delay_csec,
 		  const uint8_t *data, const uint16_t len);
 
+void tbf_dl_trigger_ass(struct gprs_rlcmac_dl_tbf *tbf, struct gprs_rlcmac_tbf *old_tbf);
 #ifdef __cplusplus
 }
 #endif