[Buildroot] [PATCH] orangepi-zero: bump linux to 4.15, u-boot to 2018.01

[Sergey Matyukevich]

Hello Peter,

> And enable dhcp for eth0 now that the ethernet is finally supported.
> 
> Signed-off-by: Peter Korsgaard <peter at korsgaard.com>

Thanks! Are you about to send the patches for other H3 boards?
If not, then let me know. I can test Ethernet on Orange One
and Orange PC variants and send the patches.

Regards,
Sergey