Use LOGPDCH macro in bts_add_paging()

Change-Id: I58daab719924d70de121f7a5f2cc1f122f8840af
diff --git a/src/bts.cpp b/src/bts.cpp
index 261da19..5769c2f 100644
--- a/src/bts.cpp
+++ b/src/bts.cpp
@@ -402,7 +402,7 @@
 				if (!bts->trx[trx].pdch[ts].add_paging(chan_needed, mi))
 					return -ENOMEM;
 
-				LOGP(DRLCMAC, LOGL_INFO, "Paging on PACCH of TRX=%d TS=%d\n", trx, ts);
+				LOGPDCH(&bts->trx[trx].pdch[ts], DRLCMAC, LOGL_INFO, "Paging on PACCH\n");
 				any_tbf = 1;
 			}
 		}