[U-Boot] serial: nsl16550: add hw flow control support

[Tom Rini]

On Wed, Apr 09, 2014 at 03:38:46PM -0400, Karicheri, Muralidharan wrote:

> keystone serial hw support hw flow control. This patch
> enables hw flow control for keystone EVMs as an optional
> feature based on CONFIG_SERIAL_HW_FLOW_CONTROL.
> 
> Signed-off-by: Murali Karicheri <m-karicheri2 at ti.com>

Applied to u-boot/master, thanks!

-- 
Tom
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