[PATCH 4/5] [ARM] Auto calculate ZRELADDR and provide option for exceptions

[Eric Miao]

> Hi,
> what about the PXA based devices, where RAM begins at 0x80000000 ?
>

I hope at this stage, it's a 1:1 direct mapping from the original zreladdr-y
variables to CONFIG_ZRELADDR.

But yeah, we can make that change some time later based on this.