misc: Change the logging for the tbf and what to log

TLLIs got printed as TBF. Fix that but also rename things to
TFI. The TFI is not required to be unique per BTS but it is
the indicator we use right now.
diff --git a/src/gprs_rlcmac_sched.cpp b/src/gprs_rlcmac_sched.cpp
index 0a290c4..76ddac4 100644
--- a/src/gprs_rlcmac_sched.cpp
+++ b/src/gprs_rlcmac_sched.cpp
@@ -96,7 +96,7 @@
 		usf = tbf->dir.ul.usf[ts];
 		LOGP(DRLCMACSCHED, LOGL_DEBUG, "Received RTS for PDCH: TRX=%d "
 			"TS=%d FN=%d block_nr=%d scheduling USF=%d for "
-			"required uplink resource of UL TBF=%d\n", trx, ts, fn,
+			"required uplink resource of UL TFI=%d\n", trx, ts, fn,
 			block_nr, usf, tfi);
 		/* next TBF to handle resource is the next one */
 		pdch->next_ul_tfi = (tfi + 1) & 31;
@@ -134,7 +134,7 @@
 	/* any message */
 	if (msg) {
 		LOGP(DRLCMACSCHED, LOGL_DEBUG, "Scheduling control "
-			"message at RTS for %s TBF=%d (TRX=%d, TS=%d)\n",
+			"message at RTS for %s TFI=%d (TRX=%d, TS=%d)\n",
 			(tbf->direction == GPRS_RLCMAC_UL_TBF)
 					? "UL" : "DL", tbf->tfi, trx, ts);
 		return msg;
@@ -178,7 +178,7 @@
 			continue;
 
 		LOGP(DRLCMACSCHED, LOGL_DEBUG, "Scheduling data message at "
-			"RTS for DL TBF=%d (TRX=%d, TS=%d)\n", tfi, trx, ts);
+			"RTS for DL TFI=%d (TRX=%d, TS=%d)\n", tfi, trx, ts);
 		/* next TBF to handle resource is the next one */
 		pdch->next_dl_tfi = (tfi + 1) & 31;
 		/* generate DL data block */