[U-Boot] am33xx: Remove serial_init in s_init for QSPI/NOR XIP boot

[Tom Rini]

On Fri, Nov 20, 2015 at 04:07:41PM +0530, Vignesh R wrote:

> serial_init() reads global_data, since global_data is not yet
> initialized, this can cause unwanted behaviour leading to QSPI XIP boot
> hang. Also, since serial_init() is anyways called later from
> boar_init_f(), it does not make sense to do the same in s_init().
> 
> Tested on AM437x IDK EVM with QSPI XIP boot.
> 
> Signed-off-by: Vignesh R <vigneshr at ti.com>
> Reviewed-by: Simon Glass <sjg at chromium.org>

Applied to u-boot/master, thanks!

-- 
Tom
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