[U-Boot] regression: setting the rpi mac address stopped working

[Gerd Hoffmann]

  Hi,

u-boot 2016.11 & newer doesn't set the mac address on my raspberry pi
any more, so the linux kernel picks a random mac address.  Bisected to
this commit:

commit b91c6a1209e7da1a7f989d9ac35d0d8be0b7b710
Author: Simon Glass <sjg at chromium.org>
Date:   Wed Oct 5 20:42:11 2016 -0600

    Fix return value in trailing_strtoln()
    
    This function should return -1 if there is no trailing integer
    in the string. Instead it returns 0. Fix it by checking for this
    condition at the start.
    
    Signed-off-by: Simon Glass <sjg at chromium.org>
    Reviewed-by: Bin Meng <bmeng.cn at gmail.com>

Appearently this change broke fdt_fixup_ethernet().

cheers,
  Gerd