net/vmxnet3: fix a build error when enabling debug output

Macro MAC_FMT and MAC_ARG are not defined, but used in vmxnet3_net_init().
This will cause build error when debug level is raised in
vmxnet3_debug.h (enable all VMXNET3_DEBUG_xxx).

Use VMXNET_MF and VXMNET_MA instead.

Signed-off-by: Miao Yan <yanmiaobest@gmail.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Dmitry Fleytman <dmitry@daynix.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>

hw/net/vmxnet3.c

@@ -2043,7 +2043,7 @@ static void vmxnet3_net_init(VMXNET3State *s)
 
     s->link_status_and_speed = VMXNET3_LINK_SPEED | VMXNET3_LINK_STATUS_UP;
 
-    VMW_CFPRN("Permanent MAC: " MAC_FMT, MAC_ARG(s->perm_mac.a));
+    VMW_CFPRN("Permanent MAC: " VMXNET_MF, VMXNET_MA(s->perm_mac.a));
 
     s->nic = qemu_new_nic(&net_vmxnet3_info, &s->conf,
                           object_get_typename(OBJECT(s)),