xprtrdma: Update comments in frwr_op_send

Commit f2877623 ("xprtrdma: Chain Send to FastReg WRs") was
written before commit ce5b3717 ("xprtrdma: Replace all usage of
"frmr" with "frwr""), but was merged afterwards. Thus it still
refers to FRMR and MWs.
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>

net/sunrpc/xprtrdma/frwr_ops.c

@@ -479,7 +479,7 @@ struct rpcrdma_mr_seg *frwr_map(struct rpcrdma_xprt *r_xprt,
  * @ia: interface adapter
  * @req: Prepared RPC Call
  *
- * For FRMR, chain any FastReg WRs to the Send WR. Only a
+ * For FRWR, chain any FastReg WRs to the Send WR. Only a
  * single ib_post_send call is needed to register memory
  * and then post the Send WR.
  *
@@ -507,7 +507,7 @@ int frwr_send(struct rpcrdma_ia *ia, struct rpcrdma_req *req)
 	}
 
 	/* If ib_post_send fails, the next ->send_request for
-	 * @req will queue these MWs for recovery.
+	 * @req will queue these MRs for recovery.
 	 */
 	return ib_post_send(ia->ri_id->qp, post_wr, NULL);
 }