Patch merged into coreboot/master: riscv-trap-handling: Add preliminary trap handling for riscv

the following patch was just integrated into master:
commit 31f0521a996791f842af94f0c561c18fd2aec2ba
Author: Thaminda Edirisooriya 
Date:   Wed Aug 26 12:22:29 2015 -0700

riscv-trap-handling: Add preliminary trap handling for riscv

RISCV requires a trap handler at the machine stage to deal with
    misaligned loads/stores, as well as to deal with calls that a linux
    payload will make in its setup. Put required assembly for jumping
    into and out of a trap here to be set up by the bootblock in a later
    commit.

Change-Id: Ibf6b18e477aaa1c415a31dbeffa50a2470a7ab2e
    Signed-off-by: Thaminda Edirisooriya 
    Reviewed-on: http://review.coreboot.org/11367
    Reviewed-by: Ronald G. Minnich 
    Tested-by: build bot (Jenkins)

See http://review.coreboot.org/11367 for details.

-gerrit