[FS#256] usb audio doesn't work - "no such device"

[LEDE Bugs]

The following task has a new comment added:

FS#256 - usb audio doesn't work - "no such device"
User who did this - Dmitry (f3flight)

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Maybe here - https://github.com/lede-project/source/blob/master/package/kernel/linux/modules/sound.mk#L51 we need to add SND_PCM_TIMER and that's about it?
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More information can be found at the following URL:
https://bugs.lede-project.org/index.php?do=details&task_id=256#comment762