[X25]: ioctl conversion 32 bit user to 64 bit kernel

To allow 32 bit x25 module structures to be passed to a 64 bit kernel via
ioctl using the new compat_sock_ioctl registration mechanism instead of the
obsolete 'register_ioctl32_conversion into hash table' mechanism

Signed-off-by: Shaun Pereira <spereira@tusc.com.au>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: David S. Miller <davem@davemloft.net>