sony-laptop: Remove unneeded semicolon

Remove a superfluous semicolon after function definition.

Signed-off-by: Yue Zou <zouyue3@huawei.com>
Link: https://lore.kernel.org/r/20210118010137.214378-1-zouyue3@huawei.com


Signed-off-by: Hans de Goede <hdegoede@redhat.com>