[U-Boot] Add ARM errata workaround 852421 and 852423 for Cortex-A17

[Andreas Färber]

Hi Nisal,

Am 08.05.2017 um 21:43 schrieb Tom Rini:
> On Wed, Apr 26, 2017 at 04:18:01PM -0500, Nisal Menuka wrote:
> 
>> ARM errata 852421 and 852423 applies to r1p0, r1p1 and r1p2
>> revisions of Cortex-A17 processors. These workarounds
>> exist in Linux kernel and I thought it would be better
>> to add them in to U-Boot.
>>
>> Signed-off-by: Nisal Menuka <nisalmenuka23 at gmail.com>
> 
> Applied to u-boot/master, thanks!

Who is going to use these? RK3288 is the only A17 chip I can think of
right now, and you haven't touched the firefly or tinker defconfigs to
select these new options, so in absence of a default or a
user-selectable name they will default to n (i.e., dead code), unless
someone also submits patches to enable these options somewhere.

Regards,
Andreas

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