Fix packet cbs/ebs conversion.

Each packet is counted as 128 bytes by the code, not 125.  Not sure
what I was thinking about here 14 years ago.  May be just a typo.

Reported by:	Dmitry Luhtionov <dmitryluhtionov@gmail.com>
MFC after:	2 weeks

sys/netgraph/ng_car.c

@@ -491,14 +491,14 @@ ng_car_rcvmsg(node_p node, item_p item, hook_p lasthook)
 				if (bconf->downstream.opt & NG_CAR_COUNT_PACKETS) {
 				    bconf->downstream.cir *= 1024;
 				    bconf->downstream.pir *= 1024;
-				    bconf->downstream.cbs *= 125;
-				    bconf->downstream.ebs *= 125;
+				    bconf->downstream.cbs *= 128;
+				    bconf->downstream.ebs *= 128;
 				}
 				if (bconf->upstream.opt & NG_CAR_COUNT_PACKETS) {
 				    bconf->upstream.cir *= 1024;
 				    bconf->upstream.pir *= 1024;
-				    bconf->upstream.cbs *= 125;
-				    bconf->upstream.ebs *= 125;
+				    bconf->upstream.cbs *= 128;
+				    bconf->upstream.ebs *= 128;
 				}
 				if ((bconf->downstream.cir > 1000000000) ||
 				    (bconf->downstream.pir > 1000000000) ||