Patch merged into coreboot/master: stage_cache: make prog const in stage_cache_add()

the following patch was just integrated into master:
commit 54546c97c780f86a050021d38109aa6c681bfd15
Author: Aaron Durbin 
Date:   Wed Aug 5 00:52:13 2015 -0500

stage_cache: make prog const in stage_cache_add()

The stage_cache_add() function should not be manipulating
    the struct prog argument in anyway. Therefore, mark it as
    const.

BUG=chrome-os-partner:43636
    BRANCH=None
    TEST=Built, booted, suspended, and resumed on glados.

Original-Change-Id: I4509e478d3c98247b9d776f6534b949d9ba6282c
    Original-Signed-off-by: Aaron Durbin 
    Original-Reviewed-on: https://chromium-review.googlesource.com/290721
    Original-Reviewed-by: Leroy P Leahy 
    Original-Reviewed-by: Duncan Laurie

Change-Id: Ibadc00a9e1cbbf12119def92d77a79077625fb85
    Signed-off-by: Aaron Durbin 
    Reviewed-on: http://review.coreboot.org/11192
    Tested-by: build bot (Jenkins)
    Reviewed-by: Patrick Georgi

See http://review.coreboot.org/11192 for details.

-gerrit