improvement for ftransfer

- Remove options related to tone generator
  In my first plan, this program generates sine wave.
  But I gave up because my ALSA driver uses interleaved buffer in contrast of FFADO.

- Add string option for libffado API to match devices
  In my plan, GUID is used for this purpose.
  But libffado have a bug related to strtoll(3) and C99/C++11.

- Add verbose option for libffado debugging.
fireworks: use memdup_user() for write ioctl in hwdep interface

Following to:
http://lkml.org/lkml/2009/3/6/132
fireworks/bebob/oxfw: remove 'return' statement in void function
firewire-lib: improvement of blace for condition statement