staging: vt6656: replaced custom DWORD definition with u32

Checkpatch findings were not resolved.

sed -i 's/\bDWORD\b/u32/g' drivers/staging/vt6656/*.[ch]
sed -i 's/\bPDWORD\b/u32 */g' drivers/staging/vt6656/*.[ch]

Signed-off-by: Andres More <more.andres@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>