Mixer Control Id Config

[kseyhan]

Hello, i struggled a little bit arround with getting my soundcard to work properly with alsamixer today. The problem is that on my tinkerboard there are two mixercontrols registered to one device.

root@tinkerboard:/# amixer scontrols Simple mixer control 'Headphone',0 Simple mixer control 'Headphone',1 Simple mixer control 'Mic',0 Simple mixer control 'Mic',1 Simple mixer control 'Extension Unit',0 Simple mixer control 'SPDIF',0

Unfortunately the index of a mixercontrol isnt respected at the moment in the source code which makes it impossible to get alsamixer output running properly on such a device.

I'll try to create a pull request later with the changes i did to get it running.