[U-Boot] drivers: firmware: psci: use pr_* log functions instead of printf()

[Tom Rini]

On Wed, Nov 29, 2017 at 03:04:40PM +0900, Masahiro Yamada wrote:

> In Linux, the warning messages are printed out by pr_warn().
> 
> We can use Linux-like log functions in tree-wide.
> 
> Signed-off-by: Masahiro Yamada <yamada.masahiro at socionext.com>
> Reviewed-by: Simon Glass <sjg at chromium.org>

Applied to u-boot/master, thanks!

-- 
Tom
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