Bluetooth: btusb: Add support USB ALT 3 for WBS
Because mSBC frames do not need to be aligned to the SCO packet boundary. Using USB ALT 3 let HCI payload >= 60 bytes, let mSBC data satisfy 60 Bytes avoid payload unaligned situation and fixed some headset no voise issue. USB Alt 3 supported also need HFP support transparent MTU in 72 Bytes. Signed-off-by: Hilda Wu <hildawu@realtek.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
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