Replace use of networkReportError with virReportError

Update the linux bridge driver to use virReportError instead
of the networkReportError custom macro
Signed-off-by: NDaniel P. Berrange <berrange@redhat.com>

cfg.mk

@@ -515,7 +515,6 @@ msg_gen_function += VMX_ERROR
 msg_gen_function += XENXS_ERROR
 msg_gen_function += lxcError
 msg_gen_function += libxlError
-msg_gen_function += networkReportError
 msg_gen_function += nodeReportError
 msg_gen_function += openvzError
 msg_gen_function += qemuReportError