CVE-2025-71096 RDMA/core: Check for the presence of LS_NLA_TYPE_DGID correctly

In the Linux kernel, the following vulnerability has been resolved: RDMA/core: Check for the presence of LSNLATYPEDGID correctly The netlink response for RDMANLLSOPIPRESOLVE should always have a LSNLATYPEDGID attribute, it is invalid if it does not. Use the nl parsing logic properly and call...