HSD #16013024105: fpga: stratix10-soc: stop kernel thread

commit  76a87be8fe73cfcc7eeb6cfef14bbcd9b6da46d4 from
https://github.com/altera-opensource/linux-socfpga.git



The kernel thread is still running after stratix10-soc gets the running
firmware version. Stop kernel thread after FW version service is completed
to save the kernel resources.

Signed-off-by: Richard Gong <richard.gong@intel.com>
Signed-off-by: Meng Li <Meng.Li@windriver.com>
Signed-off-by: Dragos-Marian Panait <dragos.panait@windriver.com>
Signed-off-by: Bruce Ashfield <bruce.ashfield@gmail.com>