ALSA: firewire-digi00x/firewire-tascam: remove wrong conversion for Config ROM

The contents of Config ROM in firewire device structure are already
aligned to CPU-endianness. Thus, no need to convert it again.

This commit removes needless conversions

Fixes: 9edf723f('ALSA: firewire-digi00x: add skeleton for Digi 002/003 family')
Fixes: c0949b27('ALSA: firewire-tascam: add skeleton for TASCAM FireWire series')
Reported-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Signed-off-by: Takashi Iwai <tiwai@suse.de>