staging: ft1000: change ft1000-download.c header to /* */ comment style

Coding style requires that comments use the standard /* */ style
instead of C99 style.
Also removed author comment from a previous contributor

Signed-off-by: Kelley Nielsen <kelleynnn@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>