[U-Boot] serial: ns16550: Handle -ENOENT when requesting clock

[Tom Rini]

On Fri, Sep 30, 2016 at 05:37:00PM +0900, Alexandre Courbot wrote:

> When calling clk_get_by_index(), fall back to the legacy method of
> getting the clock if -ENOENT is returned.
> 
> Signed-off-by: Alexandre Courbot <acourbot at nvidia.com>
> Tested-by: Stephen Warren <swarren at nvidia.com>
> Acked-by: Thierry Reding <treding at nvidia.com>

Applied to u-boot/master, thanks!

-- 
Tom
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