amdkfd: Fix accounting of device queues

This patch fixes a device QCM bug, where the number of queues were not
counted correctly for the operation of update queue. The count was incorrect
as there was no regard to the previous state of the queue.

Signed-off-by: Oded Gabbay <oded.gabbay@amd.com>

diff --cc drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager.c
Simple merge