Patch merged into coreboot/master: cb73a84 Clean up POST codes for Boot State machine

the following patch was just integrated into master:
commit cb73a8410cb80c8ff86e3d860ac3c8ae458b19ac
Author: Duncan Laurie 
Date:   Mon Jun 10 10:41:04 2013 -0700

Clean up POST codes for Boot State machine

Now that there is a clearly defined boot state machine
    we can add some useful post codes to indicate the current
    point in the state machine by having it log a post code
    before the execution of each state.

This removes the currently defined POST codes that were
    used by hardwaremain in favor of a new contiguous range
    that are defined for each boot state.

The reason for this is that the existing codes are mostly
    used to indicate when something is done, which is confusing
    for actual debug because POST code debugging relies on knowing
    what is about to happen (to know what may be at fault) rather
    than what has just finished.

One additonal change is added during device init step as this
    step often does the bulk of the work, and frequently logs POST
    codes itself.  Therefore in order to keep better track of what
    device is being initialized POST_BS_DEV_INIT is logged before
    each device is initialized.

interrupted boot with reset button and
    gathered the eventlog.  Mosys has been extended to
    decode the well-known POST codes:

26 | 2013-06-10 10:32:48 | System boot | 120
    27 | 2013-06-10 10:32:48 | Last post code in previous boot | 0x75 | Device Initialize
    28 | 2013-06-10 10:32:48 | Extra info from previous boot | PCI | 00:16.0
    29 | 2013-06-10 10:32:48 | Reset Button
    30 | 2013-06-10 10:32:48 | System Reset

Change-Id: Ida1e1129d274d28cbe8e49e4a01483e335a03d96
    Signed-off-by: Duncan Laurie 
    Reviewed-on: https://gerrit.chromium.org/gerrit/58106
    Reviewed-on: http://review.coreboot.org/4231
    Tested-by: build bot (Jenkins)
    Reviewed-by: Alexandru Gagniuc

See http://review.coreboot.org/4231 for details.

-gerrit