Bluetooth: btusb: Add WCN6855 devcoredump support

WCN6855 will report memdump via ACL data or HCI event when
it get crashed, so we collect memdump to debug firmware.

Signed-off-by: Tim Jiang <quic_tjiang@quicinc.com>
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>