RDMA/opa: Delete useless module.h include

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

Link: https://lore.kernel.org/r/9384bc21bc3b60b340e04746568746dd4cdfa468.1642960861.git.leonro@nvidia.com


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