i40iw: add main, hdr, status

i40iw_main.c contains routines for i40e <=> i40iw interface and setup.
i40iw.h is header file for main device data structures.
i40iw_status.h is for return status codes.

Changes from v2:
	more cast improvement
	fixed timing issue during unload
	added paramater change call from i40e

Changes from v1:
	improved casting issues
	do not print error using pr_err
	change from bits to bool in i40iw_cqp_request{}

Acked-by: Anjali Singhai Jain <[email protected]>
Acked-by: Shannon Nelson <[email protected]>
Signed-off-by: Faisal Latif <[email protected]>
Signed-off-by: Doug Ledford <[email protected]>

Author: fsl-latif