[U-Boot] [U-Boot, UNTESTED] ARM: orion5x: fix use of callee-saved registers in lowloevel_init

[Tom Rini]

On Mon, May 07, 2018 at 11:10:47AM +0100, Mans Rullgard wrote:

> The lowlevel_init function uses r4 and r6 without preserving their
> values as required by the AAPCS.  Use r0 and r2 instead as these
> are call-clobbered.
> 
> Signed-off-by: Mans Rullgard <mans at mansr.com>
> Reviewed-by: Chris Packham <judge.packham at gmail.com>

Applied to u-boot/master, thanks!

-- 
Tom
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