eepro100: Set configuration bit for standard TCB

For some devices, this bit is always set.
For the others, it is set by default.

Signed-off-by: Stefan Weil <weil@mail.berlios.de>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
diff --git a/hw/eepro100.c b/hw/eepro100.c
index e74d3bb..32e670e 100644
--- a/hw/eepro100.c
+++ b/hw/eepro100.c
@@ -518,6 +518,9 @@
         logout("Device %X is undefined!\n", device);
     }
 
+    /* Standard TxCB. */
+    s->configuration[6] |= BIT(4);
+
     /* Standard statistical counters. */
     s->configuration[6] |= BIT(5);