sungem: fix multicast filter CRC calculation

From the Linux sungem driver, we know that the multicast filter CRC is
implemented using ether_crc_le() which isn't the same as calling zlib's
crc32() function (the zlib implementation requires a complemented initial value
and also returns the complemented result).

Fix the multicast filter by simply using the new net_crc32_le() function.

Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Signed-off-by: Jason Wang <jasowang@redhat.com>

hw/net/sungem.c

@@ -11,12 +11,11 @@
 #include "hw/pci/pci.h"
 #include "qemu/log.h"
 #include "net/net.h"
+#include "net/eth.h"
 #include "net/checksum.h"
 #include "hw/net/mii.h"
 #include "sysemu/sysemu.h"
 #include "trace.h"
-/* For crc32 */
-#include <zlib.h>
 
 #define TYPE_SUNGEM "sungem"
 
@@ -595,7 +594,7 @@ static ssize_t sungem_receive(NetClientState *nc, const uint8_t *buf,
     }
 
     /* Get MAC crc */
-    mac_crc = crc32(~0, buf, 6);
+    mac_crc = net_crc32_le(buf, ETH_ALEN);
 
     /* Packet isn't for me ? */
     rx_cond = sungem_check_rx_mac(s, buf, mac_crc);