LU-3283 llite: pass correct pointer to obd_iocontrol()

In copy_and_ioctl() use the kernel space copy as the karg to
obd_iocontrol().

Signed-off-by: John L. Hammond <john.hammond@intel.com>
Change-Id: I9b714675b4b63737efc08eec1b08463de1d63d1b
Reviewed-on: http://review.whamcloud.com/6274
Tested-by: Hudson
Tested-by: Maloo <whamcloud.maloo@gmail.com>
Reviewed-by: Sebastien Buisson <sebastien.buisson@bull.net>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>