Patch merged into coreboot/master: lib/cbmem: allow anyone to use cbmem_possibly_online()

the following patch was just integrated into master:
commit b2a5f4833d022d16c934f7dad30cdfa8fb28863c
Author: Aaron Durbin 
Date:   Wed Dec 14 14:40:43 2016 -0600

lib/cbmem: allow anyone to use cbmem_possibly_online()

The cbmem_possibly_online() is a helpful construct. Therefore,
    push it into cbmem.h so other users can take advantage of it.

BUG=chrome-os-partner:60592
    BRANCH=reef

Change-Id: If5a1c7815ed03874dcf141014b8ffefb82b7cc92
    Signed-off-by: Aaron Durbin 
    Reviewed-on: https://review.coreboot.org/17868
    Tested-by: build bot (Jenkins)
    Reviewed-by: Furquan Shaikh 
    Reviewed-by: Paul Menzel

See https://review.coreboot.org/17868 for details.

-gerrit