sysmo: fix wrong FN jumps in rx RA.ind

There's no need for setting the FN in RA.ind since we anyway already
receive a DATA.ind beforehand.
Furthermore, the applied delay of 5 in the call is not really used at
all.

Change-Id: I437f4f95d054aea96bec3b9343e495451020ff3c
diff --git a/src/pcu_l1_if.cpp b/src/pcu_l1_if.cpp
index f28c46f..0ccf642 100644
--- a/src/pcu_l1_if.cpp
+++ b/src/pcu_l1_if.cpp
@@ -273,13 +273,7 @@
 
 void pcu_rx_block_time(struct gprs_rlcmac_bts *bts, uint16_t arfcn, uint32_t fn, uint8_t ts_no)
 {
-	bts_set_current_block_frame_number(bts, fn, 0);
-}
-
-void pcu_rx_ra_time(struct gprs_rlcmac_bts *bts, uint16_t arfcn, uint32_t fn, uint8_t ts_no)
-{
-	/* access bursts may arrive some bursts earlier */
-	bts_set_current_block_frame_number(bts, fn, 5);
+	bts_set_current_block_frame_number(bts, fn);
 }
 
 int pcu_rx_data_ind_pdtch(struct gprs_rlcmac_bts *bts, struct gprs_rlcmac_pdch *pdch, uint8_t *data,