Patch merged into coreboot/master: util/lint/kconfig_lint: change warning levels and text

the following patch was just integrated into master:
commit 8bc8be4d0ecd2c939a36f2846ef85d6f469180eb
Author: Martin Roth 
Date:   Fri Sep 30 15:56:27 2016 -0600

util/lint/kconfig_lint: change warning levels and text

- Add an exception for MAINBOARD_POWER_ON_AFTER_POWER_FAIL when checking
    - With those exceptions set, we don't have anymore #define or #ifdef
    warnings, so turn them to errors so no more can be pushed.
    - Change the definition of an unused symbol from a warning to a note.
    There are times when unused symbols are expected.
    - Upgrade the warning for loading Kconfig files multiple times from
    a warning to an error.

Change-Id: I6dcb06d4f0b099d5ccaf7643e72dd790719bdf58
    Signed-off-by: Martin Roth 
    Reviewed-on: https://review.coreboot.org/16840
    Tested-by: build bot (Jenkins)
    Reviewed-by: Stefan Reinauer

See https://review.coreboot.org/16840 for details.

-gerrit