[U-Boot] poplar: fix boot failure caused by serial driver change

[Tom Rini <trini@konsulko.com>]

On Wed, Dec 12, 2018 at 03:24:44PM +0800, Shawn Guo wrote:

> Commit 4687919684e0 ("serial: Remove DM_FLAG_PRE_RELOC flag in various
> drivers") essentially drops flag DM_FLAG_PRE_RELOC from serial_pl01x
> driver for Poplar platform, because the platform falls into the
> following strategy category made by the commit.
> 
>   Surround DM_FLAG_PRE_RELOC flag with OF_CONTROL check, for
>   drivers that support both statically declared devices and
>   configuration from device tree
> 
> Before the commit lands, Poplar platform works by statically declaring
> pl011 serial device via U_BOOT_DEVICE() with DM_FLAG_PRE_RELOC flag set
> in the driver.  But since Poplar also supports device configuration from
> device tree, the commit practically drops the flag for Poplar, and hence
> breaks the platform from booting.
> 
> This patch changes platform code and device tree to initiate pl011
> serial device from device tree rather than static declaration, so that
> above strategy about DM_FLAG_PRE_RELOC applies to Poplar, and therefore
> the reported boot failure gets fixed.
> 
> Reported-by: Igor Opaniuk <igor.opaniuk@linaro.org>
> Fixes: 4687919684e0 ("serial: Remove DM_FLAG_PRE_RELOC flag in various drivers")
> Cc: Bin Meng <bmeng.cn@gmail.com>
> Cc: Simon Glass <sjg@chromium.org>
> Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
> Reviewed-by: Igor Opaniuk <igor.opaniuk@linaro.org>
> Tested-by: Igor Opaniuk <igor.opaniuk@linaro.org>
> Reviewed-by: Bin Meng <bmeng.cn@gmail.com>

Applied to u-boot/master, thanks!

-- 
Tom
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