Otherwise, you have to press enter to boot your distro.
With this, a timeout is created. After a number of seconds,
which can be reconfigured, the first option selected will be booted,
when generating a bootflow menu.
The timeout is disabled when you navigate the menu; it only
kicks in if you don't input anything on the keyboard.
More information about how this works is in the U-Boot patches,
within this patch. I've set the timeout to 8 seconds.
Signed-off-by: Leah Rowe <leah@libreboot.org>