ALSA: hda/tas2781: Remove tas2781_spi_fwlib.c and leverage SND_SOC_TAS2781_FMWLIB

Most codes in tas2781_spi_fwlib.c are same as tas2781-fmwlib.c, mainly for
firmware parsing, only differece is the register reading, bit update and
book switching in i2c and spi. The main purpose of this patch is for code
cleaup and arrange the shared part for i2c and spi.

Signed-off-by: Shenghao Ding <shenghao-ding@ti.com>
Acked-by: Mark Brown <broonie@kernel.org>
Link: https://patch.msgid.link/20250429111055.567-1-shenghao-ding@ti.com


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