staging: vt6655: Replace VNSvInPortW with ioread16

Replace macro VNSvInPortW with ioread16.
The name of macro and the arguments use CamelCase which
is not accepted by checkpatch.pl

Signed-off-by: Philipp Hortmann <philipp.g.hortmann@gmail.com>
Link: https://lore.kernel.org/r/2d55e245cc530ffafe53384df03691d1b29b495c.1650784817.git.philipp.g.hortmann@gmail.com


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>