[TG3]: Increase TEST_BUFFER_SIZE to 8K.

This makes the DMA bug workaround test more likely
to find the problem on some systems.

Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/tg3.c b/drivers/net/tg3.c
index fb16885..2bb022a 100644
--- a/drivers/net/tg3.c
+++ b/drivers/net/tg3.c
@@ -8996,7 +8996,7 @@
 	return ret;
 }
 
-#define TEST_BUFFER_SIZE	0x400
+#define TEST_BUFFER_SIZE	0x2000
 
 static int __devinit tg3_test_dma(struct tg3 *tp)
 {