r8169: define the early size for 8111evl

For RTL8111EVL, the register of MaxTxPacketSize doesn't acctually
limit the tx size. It influnces the feature of early tx.
Signed-off-by: Hayes Wang <hayeswang@realtek.com>

drivers/net/ethernet/realtek/r8169.c

@@ -311,6 +311,7 @@ enum rtl_registers {
 	MaxTxPacketSize	= 0xec,	/* 8101/8168. Unit of 128 bytes. */
 
 #define TxPacketMax	(8064 >> 7)
+#define EarlySize	0x27
 
 	FuncEvent	= 0xf0,
 	FuncEventMask	= 0xf4,
@@ -4479,7 +4480,7 @@ static void rtl_hw_start_8168e_2(void __iomem *ioaddr, struct pci_dev *pdev)
 	rtl_w1w0_eri(ioaddr, 0x0d4, ERIAR_MASK_0011, 0x0c00, 0xff00,
 		     ERIAR_EXGMAC);
 
-	RTL_W8(MaxTxPacketSize, 0x27);
+	RTL_W8(MaxTxPacketSize, EarlySize);
 
 	rtl_disable_clock_request(pdev);