The dbg, warn and info macros are already defined by the USB stack.
Rename these macros to avoid macro redefinition warnings.

Refactor lineshift in printouts.
Signed-off-by: Hans Petter Selasky <hselasky@c2i.net>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>