- Stop transfers when RSU init fails.
- Make sure TX/RX lists don't leak and are only allocated once.
- Fix off-by one transfer index computation.
- Give firmware loading more time.

MFC after:	3 days
Use NG_WAITOK as ng_package_msg() argument instead of M_WAITOK.

Submitted by:	Dmitry Luhtionov <dmitryluhtionov@gmail.com>