[PATCH v1 3/4] arm64: Add arm64 kexec support

[Geoff Levand]

On Fri, 2016-07-22 at 11:03 +0100, Robin Murphy wrote:

> I suggest we simply copy the purgatory
> console
> implementation from, say, ARM or Alpha.

I decided on what mips had.  It was a little more applicable.

I put the code I removed into a separate patch, 'arm64: Add
purgatory printing' that we can use to build the perfect bike
shed later.

-Geoff