- compatibility issue : change firmware filenames
  the pcxhr driver version <= 1.0.18a does not work
  with new firmware > 1.0.17. Keep the old firmware files
  and add new firmware files with different names
Signed-off-by: Markus Bollinger <bollinger@digigram.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>