[U-Boot] ns16550: change reg-shift property default to zero

[Tom Rini]

On Sun, Nov 29, 2015 at 02:01:03PM +0800, Thomas Chou wrote:

> Change reg-shift property default to zero. When the integer property
> is missing, it should be taken as zero. This is consistent to Linux
> drivers/tty/serial/of_serial.c.
> 
> The x86 and most powerpc use reg-shift of 0. Most others use reg-shift
> of 2. While reg-shift of 1 is rarely used.
> 
> Signed-off-by: Thomas Chou <thomas at wytron.com.tw>
> Reviewed-by: Bin Meng <bmeng.cn at gmail.com>
> Reviewed-by: Mugunthan V N <mugunthanvnm at ti.com>
> Acked-by: Simon Glass <sjg at chromium.org>

Applied to u-boot/master, thanks!

-- 
Tom
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