The union irdma_sockaddr is used frequently. So move it to the header
file.

Link: https://lore.kernel.org/r/20220223024252.3873736-4-yanjun.zhu@linux.devSigned-off-by: NZhu Yanjun <yanjun.zhu@linux.dev>
Signed-off-by: NJason Gunthorpe <jgg@nvidia.com>