tbf: Drop unuseful flag GPRS_RLCMAC_FLAG_TO_DL_ASS

The flag is only used to print some non interesting stuff, let's drop it
in order to simplify code. We can add later whatever we want in the new
shiny FSM.

Change-Id: I13f92f058c219f230d57b3c00b8ae1d187603813
diff --git a/src/tbf_dl_ass_fsm.c b/src/tbf_dl_ass_fsm.c
index 8085fbd..cf09588 100644
--- a/src/tbf_dl_ass_fsm.c
+++ b/src/tbf_dl_ass_fsm.c
@@ -182,11 +182,16 @@
 
 static void st_wait_ack(struct osmo_fsm_inst *fi, uint32_t event, void *data)
 {
+	struct tbf_dl_ass_fsm_ctx *ctx = (struct tbf_dl_ass_fsm_ctx *)fi->priv;
+
 	switch (event) {
 	case TBF_DL_ASS_EV_RX_ASS_CTRL_ACK:
 		tbf_dl_ass_fsm_state_chg(fi, TBF_DL_ASS_NONE);
 		break;
 	case TBF_DL_ASS_EV_ASS_POLL_TIMEOUT:
+		LOGPTBF(ctx->tbf, LOGL_NOTICE,
+			"Timeout for polling PACKET CONTROL ACK for PACKET DOWNLINK ASSIGNMENT: %s\n",
+			tbf_rlcmac_diag(ctx->tbf));
 		/* Reschedule Pkt Dl Ass */
 		tbf_dl_ass_fsm_state_chg(fi, TBF_DL_ASS_SEND_ASS);
 		break;