Not only install the US but all the FW files.
Apart of that, some scripts need a little adjustement such as:
* Modify the BT baudrate to 3Mbps for EU power configuration, as it is the
baudrate used by the btnxpuart driver.
* Replace the way to reset the interface on each hcitool command to
avoid missleading BT behaviour.
https://onedigi.atlassian.net/browse/DEL-8458
Signed-off-by: Isaac Hermida <isaac.hermida@digi.com>