i40e: Strip configfs code

The use of configfs is not allowed in network drivers.  Strip the code that
uses it.

Signed-off-by: Greg Rose <gregory.v.rose@intel.com>
Tested-by: Jim Young <james.m.young@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

diff --cc drivers/net/ethernet/intel/Kconfig
Simple merge

diff --cc drivers/net/ethernet/intel/i40e/Makefile
Simple merge

diff --cc drivers/net/ethernet/intel/i40e/i40e.h
Simple merge

diff --cc drivers/net/ethernet/intel/i40e/i40e_configfs.c
Simple merge

diff --cc drivers/net/ethernet/intel/i40e/i40e_main.c
Simple merge