staging: wilc1000: remove unnecessary netdev validation check in del_key()

Removed unnecessary check to compare vif interface with zeroth index
element in vif array. Already the caller takes care of passing the
appropriate netdev handler during the del key operation.

Signed-off-by: Ajay Singh <ajay.kathat@microchip.com>
Link: https://lore.kernel.org/r/20190926151436.27819-1-ajay.kathat@microchip.com


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>