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/libosmogb.map b/src/gb/libosmogb.map
index a185470..ee8651e 100644
--- a/src/gb/libosmogb.map
+++ b/src/gb/libosmogb.map
@@ -93,7 +93,7 @@
 gprs_ns2_ip_connect2;
 gprs_ns2_ip_connect_inactive;
 gprs_ns2_ip_connect_sns;
-gprs_ns2_ip_vc_sockaddr;
+gprs_ns2_ip_vc_remote;
 gprs_ns2_is_frgre_bind;
 gprs_ns2_is_ip_bind;
 gprs_ns2_ll_str;