ioctl: Sort members their natural size

Previous attempt to align the members of all *_args structure didn't
take into account that pointer types vary between 32bit and 64bit
depending the arch. The only reliable alignemnt is to sort the members
according their natural size: 64bit, pointers, 32bit, 16bit, 8bit.

Signed-off-by: Daniel Wagner <[email protected]>

Author: dwsuse