ice: Fix SRIOV LAG disable on non-compliant aggregate

If an attribute of an aggregate interface disqualifies it from supporting
SRIOV, the driver will unwind the SRIOV support.  Currently the driver is
clearing the feature bit for all interfaces in the aggregate, but this is
not allowing the other interfaces to unwind successfully on driver unload.

Only clear the feature bit for the interface that is currently unwinding.

Fixes: bf65da2e

 ("ice: enforce interface eligibility and add messaging for SRIOV LAG")
Signed-off-by: Dave Ertman <david.m.ertman@intel.com>
Reviewed-by: Wojciech Drewek <wojciech.drewek@intel.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Tested-by: Sujai Buvaneswaran <sujai.buvaneswaran@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>