Patch merged into coreboot/master: intel cache-as-ram: Move DCACHE_RAM_BASE

the following patch was just integrated into master:
commit c86c6b33e8ca32ffa0f0d7e30f35f1fb31fe3b4a
Author: Kyösti Mälkki 
Date:   Fri Dec 9 17:43:27 2016 +0200

intel cache-as-ram: Move DCACHE_RAM_BASE

Having same memory region set as both WRPROT and WRBACK
    using MTRRs is undefined behaviour. This could happen if
    we allow DCACHE_RAM_BASE to be located within CBFS in SPI
    flash memory and XIP romstage is at the same location.

As SPI master by default decodes all of top 16MiB below
    4GiB, initial cache-as-ram line fills may have actually
    read from SPI flash even in the case DCACHE_RAM_BASE was
    below the nominal 4GiB - ROM_SIZE.

There are no reasons to have this as board-specific setting.

Change-Id: I2cce80731ede2e7f78197d9b0c77c7e9957a81b5
    Signed-off-by: Kyösti Mälkki 
    Reviewed-on: https://review.coreboot.org/17806
    Tested-by: build bot (Jenkins)
    Reviewed-by: Aaron Durbin

See https://review.coreboot.org/17806 for details.

-gerrit