Patch merged into coreboot/master: mb/lowrisc/nexys4ddr: Initialize CBMEM in romstage

the following patch was just integrated into master:
commit c978886e7bdc59de6646a164dabf01b1144b2afa
Author: Jonathan Neuschäfer 
Date:   Sat Dec 3 17:00:52 2016 +0100

mb/lowrisc/nexys4ddr: Initialize CBMEM in romstage

Change-Id: Ic1706ae8ab3cbef8f445d70cb78fa9d3301d87be
    Signed-off-by: Jonathan Neuschäfer 
    Reviewed-on: https://review.coreboot.org/17707
    Tested-by: build bot (Jenkins)
    Reviewed-by: Ronald G. Minnich

See https://review.coreboot.org/17707 for details.

-gerrit