[U-Boot] arm64: optimize smp_kick_all_cpus

[Tom Rini]

On Fri, Jun 17, 2016 at 06:32:47PM +0900, Masahiro Yamada wrote:

> gic_kick_secondary_cpus can directly return to the caller of
> smp_kick_all_cpus.  We do not have to use x29 register here.
> 
> Signed-off-by: Masahiro Yamada <yamada.masahiro at socionext.com>
> Reviewed-by: York Sun <york.sun at nxp.com>

Applied to u-boot/master, thanks!

-- 
Tom
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