RDMA/hns: fix memory leak in hnsrocealloc_mr()
This is an automated ID intended to aid in discovery of potential security vulnerabilities. The actual impact and attack plausibility have not yet been proven. This ID is fixed in Linux Kernel version v5.15.86 by commit 35f9cd060e68ff910e49bf37b1b0d336a311849a, it was introduced in version v5.8 by commit 9b2cf76c9f052987ae5c4ad450ebebdc7c5d7b87. For more details please see the references link.