RDMA/irdma: Make irdma_uk_cq_init() return a void

The function irdma_uk_cq_init always returns 0, so make it void and delete
all the return value checks.

Link: https://lore.kernel.org/r/20211019153717.3836-1-yanjun.zhu@linux.dev


Signed-off-by: Zhu Yanjun <yanjun.zhu@linux.dev>
Reviewed-by: Shiraz Saleem <shiraz.saleem@intel.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>