e1000: Count CRC in Tx statistics

The Software Developer's Manual 13.7.4.5 "Packets Transmitted (64 Bytes)
Count" says:
> This register counts the number of packets transmitted that are
> exactly 64 bytes (from <Destination Address> through <CRC>,
> inclusively) in length.

It also says similar for the other Tx statistics registers. Add the
number of bytes for CRC to those registers.

Signed-off-by: Akihiko Odaki <akihiko.odaki@daynix.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>

hw/net/e1000.c

@@ -571,7 +571,7 @@ e1000_send_packet(E1000State *s, const uint8_t *buf, int size)
         qemu_send_packet(nc, buf, size);
     }
     inc_tx_bcast_or_mcast_count(s, buf);
-    e1000x_increase_size_stats(s->mac_reg, PTCregs, size);
+    e1000x_increase_size_stats(s->mac_reg, PTCregs, size + 4);
 }
 
 static void
@@ -635,7 +635,7 @@ xmit_seg(E1000State *s)
     }
 
     e1000x_inc_reg_if_not_full(s->mac_reg, TPT);
-    e1000x_grow_8reg_if_not_full(s->mac_reg, TOTL, s->tx.size);
+    e1000x_grow_8reg_if_not_full(s->mac_reg, TOTL, s->tx.size + 4);
     s->mac_reg[GPTC] = s->mac_reg[TPT];
     s->mac_reg[GOTCL] = s->mac_reg[TOTL];
     s->mac_reg[GOTCH] = s->mac_reg[TOTH];