[coreboot-gerrit] Patch merged into coreboot/master: 3a2310e AMD Steppe Eagle: Add 32-bit Fletcher's Checksum computation

the following patch was just integrated into master:
commit 3a2310e05c971e3b46e9e91886bbc467ae49cdb6
Author: Bruce Griffith 
Date:   Wed Jul 16 11:25:21 2014 -0600

AMD Steppe Eagle: Add 32-bit Fletcher's Checksum computation

The AMD Platform Security Processor (PSP) requires a Fletcher's
    Checksum at the end of the PSP directory.  This code implements
    a Fletcher's Checksum by reading bytes from stdin and writes the
    bytes back to stdout with a checksum inserted into the byte stream
    at the appropriate offset.

This utility is used on PSP binaries during coreboot build.

Include a runtime debug option such that the command:

fletcher --print <file.bin >file_with_cksum.bin

will print out the computed checksum value for debugging.  The
    compile-time debug option is retained that allows -DDEBUG to
    be added to the compilation line.  This option has the same
    effect as "--print".

Change-Id: I506a479d8204ca4f8267d53aa152ac4b473dbc75
    Signed-off-by: Bruce Griffith 
    Reviewed-on: http://review.coreboot.org/6676
    Reviewed-by: WANG Siyuan 
    Tested-by: build bot (Jenkins)
    Reviewed-by: Zheng Bao

See http://review.coreboot.org/6676 for details.

-gerrit