ice: treat subfunction VSI the same as PF VSI

When subfunction VSI is open the same code as for PF VSI should be
executed. Also when up is complete. Reflect that in code by adding
subfunction VSI to consideration.

In case of stopping, PF doesn't have additional tasks, so the same
is with subfunction VSI.

Reviewed-by: Simon Horman <horms@kernel.org>
Signed-off-by: Michal Swiatkowski <michal.swiatkowski@linux.intel.com>
Tested-by: Rafal Romanowski <rafal.romanowski@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>