ipaccess: Remove the ipaccess_gsmnet and assume there is a bsc_gsmnet

Assume that there is a bsc_gsmnet and modify the ipaccess-config to
provide this symbol. If a bsc_gsmmnet is not available when linked
the linker will complain and fail.

E.g. give an error like this:
../../src/libbsc/libbsc.a(bts_ipaccess_nanobts.o): In function `ipaccess_sign_link_up':
src/libbsc/bts_ipaccess_nanobts.c:550: undefined reference to `bsc_gsmnet'
2 files changed
tree: ebddbdcfd212e24a2b40f4586505dd5625bbef88
  1. debian/
  2. hlrsync/
  3. linux-kernel/
  4. openbsc/
  5. wireshark/
  6. README