gprs_bssgp: rename gprs_ns_config -> gprs_ns_update_config

Improve the naming of the function to match it's purpose.

Related: SYS#5354
Change-Id: Ib8e4ae734503fd6f6695d9d6767d809e1bf79d22
diff --git a/src/pcu_l1_if.cpp b/src/pcu_l1_if.cpp
index 9873469..b6d6786 100644
--- a/src/pcu_l1_if.cpp
+++ b/src/pcu_l1_if.cpp
@@ -583,7 +583,7 @@
 		return -EINVAL;
 	}
 
-	return gprs_ns_config(bts, info_ind->nsei, local, remote, nsvci, valid);
+	return gprs_ns_update_config(bts, info_ind->nsei, local, remote, nsvci, valid);
 }
 
 static int pcu_rx_info_ind(struct gprs_rlcmac_bts *bts, const struct gsm_pcu_if_info_ind *info_ind)