Patch merged into coreboot/master: Kconfig: Remind users to delete .config when switching boards

the following patch was just integrated into master:
commit f3e26796c43c597c651181bd37f9a673b2162746
Author: Martin Roth 
Date:   Thu Dec 22 10:21:11 2016 -0700

Kconfig: Remind users to delete .config when switching boards

Because Kconfig default values *ONLY* get set when they are first
    configured, if you switch mainboards with an existing .config,
    the values will not be set as expected for the new board.

This seems to confuse most users, so put a warning in a visible
    location to let them know.

Change-Id: Ie6a9c2d139ecd841d654943f14c119ebafd632f2
    Signed-off-by: Martin Roth 
    Reviewed-on: https://review.coreboot.org/17939
    Tested-by: build bot (Jenkins)
    Reviewed-by: Nico Huber 
    Reviewed-by: Patrick Georgi

See https://review.coreboot.org/17939 for details.

-gerrit