tbf: Get rid of attribute poll_fn

That field is not needed anymore, and it works only under the assumption
that only 1 poll request can be active at a time per TBF, which is not
true.

Change-Id: I63a34a702f028b871530fb7caeb13e8ea1cc78ac
diff --git a/src/bts.cpp b/src/bts.cpp
index 0443df6..b61c6b4 100644
--- a/src/bts.cpp
+++ b/src/bts.cpp
@@ -1086,10 +1086,8 @@
 		/* limit target TA in range 0..63 bits */
 		ta_target = ta_limit(ta_adj);
 
-		LOGP(DL1IF, LOGL_INFO, "PH-DATA-IND is updating TLLI=0x%08x: TA %u -> %u on "
-				"TRX = %d, TS = %d, FN = %d\n",
-				tbf->tlli(), tbf->ta(), ta_target,
-				tbf->trx->trx_no , tbf->poll_ts, tbf->poll_fn);
+		LOGP(DL1IF, LOGL_INFO, "PH-DATA-IND is updating %s: TA %u -> %u on "
+		     "TRX = %d\n", tbf_name(tbf), tbf->ta(), ta_target, tbf->trx->trx_no);
 		tbf->set_ta(ta_target);
 	}
 }
@@ -1103,10 +1101,8 @@
 		/* limit target TA in range 0..63 bits */
 		ta_target = ta_limit(ta);
 
-		LOGP(DL1IF, LOGL_INFO, "PH-RA-IND is updating TLLI=0x%08x: TA %u -> %u on "
-				"TRX = %d, TS = %d, FN = %d\n",
-				tbf->tlli(), tbf->ta(), ta_target,
-				tbf->trx->trx_no , tbf->poll_ts, tbf->poll_fn);
+		LOGP(DL1IF, LOGL_INFO, "PH-RA-IND is updating %s: TA %u -> %u on "
+		     "TRX = %d\n", tbf_name(tbf), tbf->ta(), ta_target, tbf->trx->trx_no);
 		tbf->set_ta(ta_target);
 	}
 }