[X25]: fix kernel error message 64 bit kernel

Fixes the following error from kernel
T2 kernel: schedule_timeout:
wrong timeout value ffffffffffffffff from ffffffff88164796

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>