crypto: octeontx2 - Remove the unneeded result variable

Return the value otx2_cpt_send_mbox_msg() directly instead of storing it
in another redundant variable.
Reported-by: Zeal Robot <zealci@zte.com.cn>
Signed-off-by: ye xingchen <ye.xingchen@zte.com.cn>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

drivers/crypto/marvell/octeontx2/otx2_cptvf_mbox.c

@@ -191,7 +191,6 @@ int otx2_cptvf_send_kvf_limits_msg(struct otx2_cptvf_dev *cptvf)
 	struct otx2_mbox *mbox = &cptvf->pfvf_mbox;
 	struct pci_dev *pdev = cptvf->pdev;
 	struct mbox_msghdr *req;
-	int ret;
 
 	req = (struct mbox_msghdr *)
 	      otx2_mbox_alloc_msg_rsp(mbox, 0, sizeof(*req),
@@ -204,7 +203,5 @@ int otx2_cptvf_send_kvf_limits_msg(struct otx2_cptvf_dev *cptvf)
 	req->sig = OTX2_MBOX_REQ_SIG;
 	req->pcifunc = OTX2_CPT_RVU_PFFUNC(cptvf->vf_id, 0);
 
-	ret = otx2_cpt_send_mbox_msg(mbox, pdev);
-
-	return ret;
+	return otx2_cpt_send_mbox_msg(mbox, pdev);
 }