i40e: transmit, receive, and NAPI

This patch contains the transmit, receive, and NAPI routines, as well
as ancillary routines.

This file is code that is (will be) used by both the VF and PF
drivers.

Signed-off-by: Jesse Brandeburg <[email protected]>
Signed-off-by: Shannon Nelson <[email protected]>
CC: PJ Waskiewicz <[email protected]>
CC: [email protected]
Tested-by: Kavindya Deegala <[email protected]>
Signed-off-by: Jeff Kirsher <[email protected]>

Author: jbrandeb