ALSA: hda/cs8409: Use enums for register names and coefficients

Signed-off-by: Stefan Binding <sbinding@opensource.cirrus.com>
Signed-off-by: Vitaly Rodionov <vitalyr@opensource.cirrus.com>
Link: https://lore.kernel.org/r/20210811185654.6837-4-vitalyr@opensource.cirrus.com


Signed-off-by: Takashi Iwai <tiwai@suse.de>