staging: speakup: Split the comment to fit the length

Split the comment to fit the length.

Signed-off-by: Panir Nyan <Panir.Nyan@gmail.com>
Acked-by: Samuel Thibault <samuel.thibault@ens-lyon.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>