Bluetooth: vhci: Add support for setting msft_opcode and aosp_capable

This adds a debugfs entries to set msft_opcode and aosp_capable enabling
vhci to emulate controllers with MSFT/AOSP extension support.

Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>