Move RELEASING tbf_state transition to tbf_fsm

PdchUlcTest output changes because the original state NULL is not
expected when transactioning to RELEASING upon MAX N310* being hit. In
any case, none of those events should happen in NULL state, but we
don't really care about TBF states there so we are fine with whatever
the state is.

Related: OS#2709
Change-Id: I516b8d989a0d705e5664f8aeaf7d108e0105aa16
diff --git a/src/tbf_fsm.h b/src/tbf_fsm.h
index 1dba80f..ae0d6ae 100644
--- a/src/tbf_fsm.h
+++ b/src/tbf_fsm.h
@@ -35,6 +35,9 @@
 	TBF_EV_LAST_DL_DATA_SENT, /* DL TBF sends RLCMAC block containing last DL avilable data buffered */
 	TBF_EV_LAST_UL_DATA_RECVD, /* UL TBF sends RLCMAC block containing last UL data (cv=0) */
 	TBF_EV_FINAL_ACK_RECVD, /* DL ACK/NACK with FINAL_ACK=1 received from MS */
+	TBF_EV_MAX_N3101, /* MAX N3101 (max usf timeout) reached (UL TBF) */
+	TBF_EV_MAX_N3103, /* MAX N3103 (max Pkt Ctrl Ack for last UL ACK/NACK timeout) reached (UL TBF) */
+	TBF_EV_MAX_N3105, /* MAX N3105 (max poll timeout) reached (UL/DL TBF) */
 };
 
 enum tbf_fsm_states {