Currently, cur_prog/cur_conf remains at the default value (-1), while
program 0 has been loaded into the amplifiers.

In the playback hook, tasdevice_tuning_switch tries to restore the
cur_prog/cur_conf. In the runtime_resume/system_resume,
tasdevice_prmg_load tries to load the cur_prog as well.

Set cur_prog and cur_conf to 0 if available in the firmware.

Fixes: 5be27f1e ("ALSA: hda/tas2781: Add tas2781 HDA driver")
CC: stable@vger.kernel.org
Signed-off-by: Gergo Koteles <soyer@irl.hu>
Link: https://lore.kernel.org/r/038add0bdca1f979cc7abcce8f24cbcd3544084b.1702596646.git.soyer@irl.huSigned-off-by: Takashi Iwai <tiwai@suse.de>