Stopping an already disabled vport leads to firmware
assert. Stop the vport only if it was started.
Fixes: 2ea6f76aff ("qede: add core driver")
Cc: stable@dpdk.org
Signed-off-by: Manish Chopra <manishc@marvell.com>
Signed-off-by: Rasesh Mody <rmody@marvell.com>