r8169: add missing MODULE_FIRMWARE entry for RTL8126A rev.b

Add a missing MODULE_FIRMWARE entry.

Fixes: 69cb8998 ("r8169: add support for RTL8126A rev.b")
Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Link: https://patch.msgid.link/bb307611-d129-43f5-a7ff-bdb6b4044fce@gmail.comSigned-off-by: Paolo Abeni <pabeni@redhat.com>

drivers/net/ethernet/realtek/r8169_main.c

@@ -708,6 +708,7 @@ MODULE_FIRMWARE(FIRMWARE_8107E_2);
 MODULE_FIRMWARE(FIRMWARE_8125A_3);
 MODULE_FIRMWARE(FIRMWARE_8125B_2);
 MODULE_FIRMWARE(FIRMWARE_8126A_2);
+MODULE_FIRMWARE(FIRMWARE_8126A_3);
 
 static inline struct device *tp_to_dev(struct rtl8169_private *tp)
 {