[PATCH v2] Revert "serial: 8250: Clear CON_PRINTBUFFER on port re-registration"

[Fushuai Wang]

> > From: Fushuai Wang <wangfushuai@xxxxxxxxx>
> > 
> > This reverts commit d338ab1d90603f875c4f7ed223406535378173a5.
> > 
> > uart_console() only indicates that the port is selected as the console.
> > It does not mean that the console has already been registered or has
> > printed the buffered messages.
> 
> The multi-system boot regression this fixes is still present in -next.

Hi, Greg

Just a ping.

Mark has confirmed that the regression is still present in -next.
Could you please take a look and consider applying it to tty/tty-testing 
and tty/tty-next?

-- 
Regards,
Fushuai