RDMA/qib: Fix typos in comments

Various spelling mistakes in comments. Detected with the help of
Coccinelle.

Link: https://lore.kernel.org/r/20220314115354.144023-23-Julia.Lawall@inria.fr
Signed-off-by: Julia Lawall <Julia.Lawall@inria.fr>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>