[U-Boot] [PATCH] menu: don't bother going interactive with just one menu item

[Leon Yu]

On Fri, Jun 21, 2019 at 09:07:39PM +0200, Frank Wunderlich wrote:
> imho this makes it impossible to get into uboot-console which is not a "real" menuitem
> 
> it is only shown after the list of defined Menuitems
> 
> http://git.denx.de/?p=u-boot.git;a=blob;f=cmd/bootmenu.c;h=7f88c1ed63252ba046f07a9b1b59e70ff06d8dad;hb=HEAD#l325

uboot-console IS a menuitem. It's just not populated from bootmenu_$
environment variables but appended by bootmenu_create. Apart from that,
things work in the same way. So the behavior with this change is:

1) If no bootmenu_$ env. variable is defined, do_bootmenu will skip selection
and get into console which is the only option in the menu.
2) With at least one valid bootmenu_$, do_bootmenu displays those option(s)
from env along with "U-Boot console" and waits for user's input.

Leon

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