i40e: Memory leak in i40e_config_iwarp_qvlist

[ Upstream commit 0b63644602cfcbac849f7ea49272a39e90fa95eb ]

Added freeing the old allocation of vf->qvlist_info in function
i40e_config_iwarp_qvlist before overwriting it with
the new allocation.

Fixes: e3219ce6 ("i40e: Add support for client interface for IWARP driver")
Signed-off-by: Martyna Szapar <martyna.szapar@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: Jesse Brandeburg <jesse.brandeburg@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>