Bluetooth: Make macro definition compatible with 7-2018-q2-update g++

In C++ designated initializers require that designators used in the
expression must appear in the same order as the data members.

In addition, 7-2018-q2-update version of g++ doesn't support
implicit member initialization, so all members must be
initialized.

Signed-off-by: Alexey Eremin <a.eremin.msu@gmail.com>