gtphub: rename sgsn's oww osmo_sockaddr into sgsn_sockaddr

The osmo_ prefix should be only used for official struct/apis of libosmocore.
This commit was done via `sed -i 's/osmo_sockaddr/sgsn_sockaddr/g'`.

In prepartion of introducing a different api of osmo_sockaddr to
libosmocore.

Change-Id: Ibb1ddce9ff1ffe7494de5cdb8ea1843c45fe4566
1 file changed