RDMA/mthca: Delete useless module.h include

There is no need in include of module.h in the following file.

Link: https://lore.kernel.org/r/ab856f40804d67905a655bc85e480d96ff66e46e.1642960861.git.leonro@nvidia.com


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