i40iw: add file to handle cqp calls

i40iw_ctrl.c provides for hardware wqe support and cqp.

Changes since v2:
	cleanup coccinelle error reported by Julia Lawall

Changes since v1:
	reported by Christoph Hellwig's review
        -remove unnecessary casts

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