Bluetooth: btqca: Add support to read FW build version for WCN3991 BTSoC
Add support to read FW build version from debugfs node. This info can be read from /sys/kernel/debug/bluetooth/hci0/firmware_info Signed-off-by: Venkata Lakshmi Narayana Gubba <gubbaven@codeaurora.org> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>