staging: vt6656: fixed whitespace related errors around operators

removed prohibited spaces around operators and added required
spaces around operators wherever necessary to fix checkpatch
errors

Signed-off-by: Nandini Hanumanthagowda <nandu.hgowda@gmail.com>
Reviewed-by: Josh Triplett <josh@joshtriplett.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>