Assign TFI to complete TRX, not just one TS

This is required, since we may change slot allocation. In case of a
change, we do not want to be unable to change, if the same TFI on one of
the other slots is already in use by a different TBF (having same TFI, but
on different slot).
diff --git a/src/sysmo_sock.cpp b/src/sysmo_sock.cpp
index 6b390ed..e3b9516 100644
--- a/src/sysmo_sock.cpp
+++ b/src/sysmo_sock.cpp
@@ -94,16 +94,15 @@
 
 	/* disable all slots, kick all TBFs */
 	for (trx = 0; trx < 8; trx++) {
-		for (ts = 0; ts < 8; ts++) {
+		for (ts = 0; ts < 8; ts++)
 			bts->trx[trx].pdch[ts].enable = 0;
-			for (tfi = 0; tfi < 32; tfi++) {
-				tbf = bts->trx[trx].pdch[ts].ul_tbf[tfi];
-				if (tbf)
-					tbf_free(tbf);
-				tbf = bts->trx[trx].pdch[ts].dl_tbf[tfi];
-				if (tbf)
-					tbf_free(tbf);
-			}
+		for (tfi = 0; tfi < 32; tfi++) {
+			tbf = bts->trx[trx].ul_tbf[tfi];
+			if (tbf)
+				tbf_free(tbf);
+			tbf = bts->trx[trx].dl_tbf[tfi];
+			if (tbf)
+				tbf_free(tbf);
 		}
 	}