staging:media:davinci_vpfe: Fixed block comments according to kernel coding style

Fixed block comments by following the checkpatch warnings

WARNING: Block comments use * on subsequent lines
WARNING: Block comments use a trailing */ on separate line

Signed-off-by: Thaissa Falbo <thaissa.falbo@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>