Message logged by 'dev_xxx()' or 'pr_xxx()' should end with a '\n'.

Fixes: 145d59ba ("platform/chrome: cros_ec_sensorhub: Add FIFO support")
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Signed-off-by: Enric Balletbo i Serra <enric.balletbo@collabora.com>