RDMA/qib: rename copy_io to qib_copy_io

Add the proper module prefix to avoid conflicts with a function
in the scheduler.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/20211126115817.2087431-2-hch@lst.de


Signed-off-by: Jens Axboe <axboe@kernel.dk>