l1if: fix: s/pcu_rx_rach_ind_pdtch/pcu_rx_rach_ind_ptcch/g

This is not a functional change, just fixing misleading function
name. Access Bursts on PTCCH/U have nothing to do with PDTCH.

Change-Id: I4ab710ba026315301cc6970263967616401a9fc8
diff --git a/src/pcu_l1_if.cpp b/src/pcu_l1_if.cpp
index 40e933e..8764024 100644
--- a/src/pcu_l1_if.cpp
+++ b/src/pcu_l1_if.cpp
@@ -430,7 +430,7 @@
 }
 
 /* C -> C++ adapter for direct DSP access code (e.g. osmo-bts-sysmo) */
-extern "C" int pcu_rx_rach_ind_pdtch(uint8_t trx_nr, uint8_t ts_nr, uint32_t fn, int16_t qta)
+extern "C" int pcu_rx_rach_ind_ptcch(uint8_t trx_nr, uint8_t ts_nr, uint32_t fn, int16_t qta)
 {
 	return BTS::main_bts()->rcv_ptcch_rach(trx_nr, ts_nr, fn, qta);
 }