alsa/acp: make pa_ato* functions behave as PA ones
The pulseaudio pa_ato* functions set errno and return -1, when the number cannot be parsed.
Some parts of parsing the profile files (e.g. parse_eld_device) rely on these functions returning errors when the input is not a number.
This is the reason why device.product.name does not appear in #1978 (closed)
Edited by P V