V4L/DVB: ngene: Remove firmware debugging

Remove firmware debugging, because setting ngene_fw_debug and requesting
firmware from file causes a kernel error.

Signed-off-by: Matthias Benesch <twoof7@freenet.de>
Signed-off-by: Oliver Endriss <o.endriss@gmx.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>