eepro100: replace g_malloc()+memcpy() with g_memdup()

I found these pattern via grepping the source tree. I don't have a
coccinelle script for it!

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Stefan Weil <sw@weilnetz.de>
Reviewed-by: Jason Wang <jasowang@redhat.com>
Reviewed-by: Richard Henderson <rth@twiddle.net>

hw/net/eepro100.c

@@ -1904,8 +1904,7 @@ static void e100_nic_realize(PCIDevice *pci_dev, Error **errp)
 
     qemu_register_reset(nic_reset, s);
 
-    s->vmstate = g_malloc(sizeof(vmstate_eepro100));
-    memcpy(s->vmstate, &vmstate_eepro100, sizeof(vmstate_eepro100));
+    s->vmstate = g_memdup(&vmstate_eepro100, sizeof(vmstate_eepro100));
     s->vmstate->name = qemu_get_queue(s->nic)->model;
     vmstate_register(&pci_dev->qdev, -1, s->vmstate, s);
 }