[U-Boot] rockchip: board: lion-rk3368: increase phy autonegotiation timeout

[Philipp Tomsich]

> The first dhcp command consistently fails with a timeout when
> the lion-rk3368 board is connected to a Zyxel GS1100-24E
> Gigabit Ethernet switch:
> 
>   ethernet at ff290000 Waiting for PHY auto negotiation to complete......... TIMEOUT !
> 
> Increasing PHY_ANEG_TIMEOUT from the default 4000 to 8000 makes the
> first dhcp command work reliably.
> 
> Signed-off-by: Jakob Unterwurzacher <jakob.unterwurzacher at theobroma-systems.com>
> ---
>  include/configs/lion_rk3368.h | 2 ++
>  1 file changed, 2 insertions(+)
> 

Applied to u-boot-rockchip, thanks!