Update kfmapp.c

Audio handling in kfmapp is done in two steps:
* config and open device 0 and 1 on our sound card as playback and capture devices.
* use a function to call tinymix to route the audio from the FM receiver into the capture device (card 0 input). From there the playback device (card 0 output) will send it to the specified target using tinymix.

Current problem is that the values to set in tinymix differ from device to device. Because of this automatic (hardcoded) routing has been #ifdef 'd out. Building the tinymix app and pushing it to /system/xbin allows for manual routing. There is only one catch to this. Different mixers use different input formats and even though tinymix is quite smart at detecting 1,2,3 input values, it may not properly set the flags.

Lastly we would have to know which flag does what for our mixer.