RDMA/erdma: Fix unset QPN of GSI QP

The QPN of the GSI QP was not set, which may cause issues.
Set the QPN to 1 when creating the GSI QP.

Fixes: 999a0a2e ("RDMA/erdma: Support UD QPs and UD WRs")
Reviewed-by: Cheng Xu <chengyou@linux.alibaba.com>
Signed-off-by: Boshi Yu <boshiyu@linux.alibaba.com>
Link: https://patch.msgid.link/20250725055410.67520-4-boshiyu@linux.alibaba.com


Reviewed-by: Zhu Yanjun <yanjun.zhu@linux.dev>
Signed-off-by: Leon Romanovsky <leon@kernel.org>