tbf/pdch/bts: Move the tbf look-up by tfi into the BTS
diff --git a/src/bts.h b/src/bts.h
index 7d8f422..f785899 100644
--- a/src/bts.h
+++ b/src/bts.h
@@ -164,6 +164,7 @@
 
 	gprs_rlcmac_tbf *tbf_by_tlli(uint32_t tlli, enum gprs_rlcmac_tbf_direction dir);
 	gprs_rlcmac_tbf *tbf_by_poll_fn(uint32_t fn, uint8_t trx, uint8_t ts);
+	gprs_rlcmac_tbf *tbf_by_tfi(uint8_t tfi, uint8_t trx, enum gprs_rlcmac_tbf_direction dir);
 
 private:
 	int m_cur_fn;