[OE-core] Aarch64 u-boot with gcc .5x

[akuster808]

Hello,

I have an arm64 odroid c2 board.  If I build u-boot with the current OE
5.3 gcc it hangs at kernel load time. If I use 4.9 gcc it works fine. A
5.3 built kernel boots fine with a 4.9 built u-boot.

The vendor supplied u-boot is hacked up and am leaning it that direction
as the culprit so I am looking for data points.

Is anyone using a current u-boot with 5.3 gcc on an arm64 machine? if
so, any special tweaks to get that combo to work?

kind regards,
Armin