staging: vt6655: Add missing BE support on 2x iowrite32

Add missing big-endian support when using two times iowrite32
to write 64 Bit.

Signed-off-by: Philipp Hortmann <philipp.g.hortmann@gmail.com>
Link: https://lore.kernel.org/r/974ef7a9244e7caeafd8c176c7b53a6de3c20219.1653203927.git.philipp.g.hortmann@gmail.com


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