ALSA: hda/tas2781: Add name prefix tas2781 for tas2781's dvc_tlv and amp_vol_tlv

With some new devices adding into the driver, dvc_tlv and amp_vol_tlv will
cause confusion for customers on which devices they support.

Fixes: 5be27f1e ("ALSA: hda/tas2781: Add tas2781 HDA driver")
Signed-off-by: Shenghao Ding <shenghao-ding@ti.com>

Link: https://patch.msgid.link/20250816042741.1659-1-shenghao-ding@ti.com


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