RDMA: Fix kernel-doc compilation warnings

This patch fixes bunch of kernel-doc compilation warnings like below:

 drivers/infiniband/hw/i40iw/i40iw_cm.c:4372: warning: expecting prototype for i40iw_ifdown_notify(). Prototype was for i40iw_if_notify() instead

Link: https://lore.kernel.org/r/20210314133908.291945-2-leon@kernel.org


Signed-off-by: Leon Romanovsky <leonro@nvidia.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>