Patch merged into coreboot/master: 543aa7b kconfig: add named choice group

the following patch was just integrated into master:
commit 543aa7ba7bcc367d420f910141c33068154e5b3a
Author: Roman Zippel 
Date:   Fri Feb 29 05:11:50 2008 +0100

kconfig: add named choice group

As choice dependency are now fully checked, it's quite easy to add support
    for named choices. This lifts the restriction that a choice value can only
    appear once, although it still has to be within the same group,
    but multiple choices can be joined by giving them a name.
    While at it I cleaned up a little the choice type logic to simplify it a
    bit.

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

=======

Cherry-picked from the Linux kernel.

Change-Id: If0f00d1783907d606220cda5307b8960d3bfc38d
    Signed-off-by: Gabe Black 
    Reviewed-on: http://review.coreboot.org/3291
    Tested-by: build bot (Jenkins)
    Reviewed-by: Ronald G. Minnich

See http://review.coreboot.org/3291 for details.

-gerrit