habanalabs: skip DISABLE PCI packet to FW on heartbeat

if reset is due to heartbeat, device CPU is no responsive in which
case no point sending PCI disable message to it.

Signed-off-by: Ohad Sharabi <osharabi@habana.ai>
Reviewed-by: Oded Gabbay <ogabbay@kernel.org>
Signed-off-by: Oded Gabbay <ogabbay@kernel.org>