Patch merged into coreboot/master: 58decc5 memlayout: Make sure preram_cbmem_console symbols exist

the following patch was just integrated into master:
commit 58decc540dd40c180542d214f74773c7c17b4f28
Author: Patrick Georgi 
Date:   Thu Apr 23 14:40:22 2015 +0200

memlayout: Make sure preram_cbmem_console symbols exist

This enables its _size variable (a macro) to work even when
    the console has no location assigned to it in the chip/board's
    memlayout.ld.
    Since _size == 0, the code will do the right thing.

Change-Id: I6b42ed0c5c3aaa613603680728b61cbdb24c4b61
    Signed-off-by: Patrick Georgi 
    Reviewed-on: http://review.coreboot.org/9973
    Tested-by: build bot (Jenkins)
    Reviewed-by: Aaron Durbin

See http://review.coreboot.org/9973 for details.

-gerrit