Patch merged into coreboot/master: 330bb6a kconfig: fix choice dependency check

the following patch was just integrated into master:
commit 330bb6acc8b198d95acc979c89de2d7ed1c0c96f
Author: Roman Zippel 
Date:   Fri Feb 29 05:10:24 2008 +0100

kconfig: fix choice dependency check

Properly check the dependency of choices as a group.
    Also fix that sym_check_deps() correctly terminates the dependency loop
    error check (otherwise it would continue printing the dependency chain).

Signed-off-by: Roman Zippel 
    Signed-off-by: Sam Ravnborg

=======

Cherry-picked from the Linux kernel.

Change-Id: I0c98760dd0f55cf2ff70c53e0b014288b59574c8
    Signed-off-by: Gabe Black 
    Reviewed-on: http://review.coreboot.org/3290
    Tested-by: build bot (Jenkins)
    Reviewed-by: Ronald G. Minnich

See http://review.coreboot.org/3290 for details.

-gerrit