Use kthread_run instead of kthread_create when create kconsole thread.
We should call wake_up_process after kthread_create, otherwise kconsole
will keep in TASK_UNINTERRUPTIBLE state when loglevel=0. Then kconsole
will become hung task, and will trigger hung task timeout.
Change-Id: I6b9edfc60a96202b356d0fe519073ea4665ae32a
Signed-off-by: Tao Huang <huangtao@rock-chips.com>