staging: vt6655: Fixed checkpatch errors

This patch fixes the errors report by the checkpatch script.
Most of them are use of C99 comments.

The checkpatch doesn't report any errors after the clean up.
However, please not that there are still ton of warnings left.

Signed-off-by: Petar Dimitrijevic <petar.dimitrijevic@vorteksed.com.mk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>