linux-imx

r8169: factor out firmware handling

Let's factor out firmware handling into a separate source code file.
This simplifies reading the code and makes clearer what the interface
between driver and firmware handling is.

Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>