wifi: brcmfmac: fix copyright year mentioned in platform_data header

The driver found its inception a little after the year 201. According
git blame output it was added in 2016 so lets go with that.

Fixes: 4d792895

 ("brcmfmac: switch to new platform data")
Reported-by: Dmitry Antipov <dmantipov@yandex.ru>
Signed-off-by: Arend van Spriel <arend.vanspriel@broadcom.com>
Signed-off-by: Kalle Valo <kvalo@kernel.org>
Link: https://msgid.link/20240128093057.164791-3-arend.vanspriel@broadcom.com