i40e: Implement the API function for aq_set_switch_config

Add the support code for calling the AdminQ API call aq_set_switch_config

Signed-off-by: Shannon Nelson <shannon.nelson@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>