gprs_rlcmac: convert from C++ to C

Change-Id: I7260ad1a67ebdc09767a679e579fead262f1627a
diff --git a/src/pcu_l1_if.h b/src/pcu_l1_if.h
index 3865402..f787c40 100644
--- a/src/pcu_l1_if.h
+++ b/src/pcu_l1_if.h
@@ -148,7 +148,6 @@
 		       uint8_t *data, size_t data_len);
 void pcu_l1if_tx_agch(struct gprs_rlcmac_bts *bts, bitvec *block, int len);
 
-void pcu_l1if_tx_pch(struct gprs_rlcmac_bts *bts, bitvec *block, int plen, const char *imsi);
 void pcu_l1if_tx_pch_dt(struct gprs_rlcmac_bts *bts, bitvec *block, int plen, const char *imsi, uint32_t tlli);
 #endif
 
@@ -158,6 +157,7 @@
 struct gprs_rlcmac_bts;
 
 int pcu_tx_neigh_addr_res_req(struct gprs_rlcmac_bts *bts, const struct neigh_cache_entry_key *neigh_key);
+void pcu_l1if_tx_pch(struct gprs_rlcmac_bts *bts, struct bitvec *block, int plen, const char *imsi);
 
 int pcu_rx(struct gsm_pcu_if *pcu_prim, size_t pcu_prim_length);
 int pcu_l1if_open(void);