Patch merged into coreboot/master: mb/emulation/*-riscv: Don't select ARCH_BOOTBLOCK_RISCV

the following patch was just integrated into master:
commit c706eaf068515690184b3a67ee255a265a808618
Author: Jonathan Neuschäfer 
Date:   Fri Feb 17 18:06:33 2017 +0100

mb/emulation/*-riscv: Don't select ARCH_BOOTBLOCK_RISCV

It's already selected by SOC_UCB_RISCV.

Change-Id: Ic8a14300cdea2a4ab763b2746434891b72843604
    Signed-off-by: Jonathan Neuschäfer 
    Reviewed-on: https://review.coreboot.org/18390
    Tested-by: build bot (Jenkins)
    Reviewed-by: Paul Menzel 
    Reviewed-by: Martin Roth

See https://review.coreboot.org/18390 for details.

-gerrit