staging: vt6655: 64 bit Correct alignment of tx/rx structures.

Aligment of pointers on 64 bit is incorrect.

Align to 64 bit using aligned 8 bytes and remove structure packing.

This allows the device to run on both 32 and 64 bit

Signed-off-by: Malcolm Priestley <tvboxspy@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>