IB/vmw_pvrdma: Don't leak info from alloc_ucontext

Clear out the user response struct correctly.

Fixes: 29c8d9eb ("IB: Add vmw_pvrdma driver")
Reported-by: NDan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: NAdit Ranadive <aditr@vmware.com>
Signed-off-by: NDoug Ledford <dledford@redhat.com>

drivers/infiniband/hw/vmw_pvrdma/pvrdma_verbs.c

@@ -306,7 +306,7 @@ struct ib_ucontext *pvrdma_alloc_ucontext(struct ib_device *ibdev,
 	union pvrdma_cmd_resp rsp;
 	struct pvrdma_cmd_create_uc *cmd = &req.create_uc;
 	struct pvrdma_cmd_create_uc_resp *resp = &rsp.create_uc_resp;
-	struct pvrdma_alloc_ucontext_resp uresp;
+	struct pvrdma_alloc_ucontext_resp uresp = {0};
 	int ret;
 	void *ptr;