[U-Boot] [PATCH] Enable serial console only before booting

[Wolfgang Denk]

Dear Frédéric Leroy,

In message <1373192736-5014-1-git-send-email-fredo at starox.org> you wrote:
> When netconsole is active, some boards fail to boot.
> This patch enables only the serial console before
> control is handed by another operating system.

I really hate adding such fixes without understanding the exact nature
of the problem.

Could you please be so kind and explain in which way booting fails
when netconsole is active?  On what exactly the "some boards" are that
fail that way?  And why this does not appear to be a problem on other
boards? (or is it?)  And thy the "some boards" cannot be fixed in such
a way to behave as the rest of the boards (where it's not a problem) ?