tbf: Drop unuseful flag GPRS_RLCMAC_FLAG_TO_UL_ASS

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

Change-Id: I20aa7f83cc4f32de129e64c74a91745b983a7b16
diff --git a/src/tbf_ul_ass_fsm.c b/src/tbf_ul_ass_fsm.c
index a55309d..00f4bfd 100644
--- a/src/tbf_ul_ass_fsm.c
+++ b/src/tbf_ul_ass_fsm.c
@@ -210,11 +210,16 @@
 
 static void st_wait_ack(struct osmo_fsm_inst *fi, uint32_t event, void *data)
 {
+	struct tbf_ul_ass_fsm_ctx *ctx = (struct tbf_ul_ass_fsm_ctx *)fi->priv;
+
 	switch (event) {
 	case TBF_UL_ASS_EV_RX_ASS_CTRL_ACK:
 		tbf_ul_ass_fsm_state_chg(fi, TBF_UL_ASS_NONE);
 		break;
 	case TBF_UL_ASS_EV_ASS_POLL_TIMEOUT:
+		LOGPTBF(ctx->tbf, LOGL_NOTICE,
+			"Timeout for polling PACKET CONTROL ACK for PACKET UPLINK ASSIGNMENT: %s\n",
+			tbf_rlcmac_diag(ctx->tbf));
 		/* Reschedule Pkt Ul Ass */
 		tbf_ul_ass_fsm_state_chg(fi, TBF_UL_ASS_SEND_ASS);
 		break;