gprs_ns2: rename gprs_ns2_ip_vc_sockaddr -> gprs_ns2_ip_vc_remote

It's more clear which part of the address is returned.
In preparation to add a gprs_ns2_ip_vc_local.

Change-Id: I6110ff573362961c713a990da7ef3f3dbedf6c57
diff --git a/src/gb/gprs_ns2_udp.c b/src/gb/gprs_ns2_udp.c
index 9aca80b..e689118 100644
--- a/src/gb/gprs_ns2_udp.c
+++ b/src/gb/gprs_ns2_udp.c
@@ -396,7 +396,7 @@
 /*! Return the socket address of the remote peer of a NS-VC.
  *  \param[in] nsvc NS-VC whose remote peer we want to know
  *  \return address of the remote peer; NULL in case of error */
-const struct osmo_sockaddr *gprs_ns2_ip_vc_sockaddr(struct gprs_ns2_vc *nsvc)
+const struct osmo_sockaddr *gprs_ns2_ip_vc_remote(struct gprs_ns2_vc *nsvc)
 {
 	struct priv_vc *priv;