Drivers: hv: vmbus: remove hv_synic_free_cpu() call from hv_synic_cleanup()

Drivers: hv: vmbus: remove hv_synic_free_cpu() call from hv_synic_cleanup()

We already have hv_synic_free() which frees all per-cpu pages for all
CPUs, let's remove the hv_synic_free_cpu() call from hv_synic_cleanup()
so it will be possible to do separate cleanup (writing to MSRs) and final
freeing. This is going to be used to assist kexec.

Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
(cherry picked from commit 06210b42f33ea1c29a90f4db2d88be91c511154b)

Orabug: 21886720
Signed-off-by: Jason Luo <zhangqing.luo@oracle.com>