staging: vt6656: cleared C99 // comments in datarate.c

Cleared 'do not use C99 // comments' checkpatch error, several warnings
about code indentation and camel casing were not resolved.

Signed-off-by: Andres More <more.andres@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>