payloads/external/SeaBIOS: Upgrade stable from 1.7.2.1 to 1.7.4

SeaBIOS 1.7.4 was released in December 2013 [1] and, besides other
things, supports writing debug messages to CBMEM console.

The new SeaBIOS Kconfig option `DEBUG_COREBOOT` has to be added to the
SeaBIOS configuration file `.config` as otherwise the SeaBIOS build
from within coreboot (`PAYLOAD_SEABIOS`) is interrupted as it is
detected as a new option.

This option was already added and enabled in commit 7c1a49bc [1]

	SeaBIOS: have coreboot pass the choice to run optionroms in parallel

so SeaBIOS messages are now written to the CBMEM console.

Successfully tested on the Asus M2V-MX SE.

[1] http://seabios.org/Releases
[2] http://review.coreboot.org/5443

Change-Id: I675a50532735b4921a664e4b24d98be17b9a1002
Signed-off-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-on: http://review.coreboot.org/5093
Tested-by: build bot (Jenkins)
Reviewed-by: Peter Stuge <peter@stuge.se>
Reviewed-by: Marc Jones <marc.jones@se-eng.com>
util/board_status/board_status.sh: Save ROM contents in `cbfs.txt`

The ROM content (CBFS content) captured with

	cbfstool build/coreboot.rom print

is useful for two reasons.

1. With the used configuration for the build in `.config`, it can be
compared how the size for romstage and ramstage change over time. To
make that reproducible the used toolchain should also be stored
somewhere in the future.

2. With the CBFS content the time stamps can be better interpreted.
For example, the size of the payload file is needed to interpret the
time stamp for loading the payload.

Change-Id: If77ca6412b1710e560f405f9a48df613c1819d36
Signed-off-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-on: http://review.coreboot.org/5867
Tested-by: build bot (Jenkins)
Reviewed-by: David Hendricks <dhendrix@chromium.org>
Reviewed-by: Edward O'Callaghan <eocallaghan@alterapraxis.com>
Reviewed-by: Marc Jones <marc.jones@se-eng.com>
superio/ite/it8712f: Drop model specific sio func for generic ver

Drop it8712f_kill_watchdog() in favor of common ite_kill_watchdog()
introduced in commit rev:

a7d14a1 ite/common: Introduce common watchdog and 3.3V VSB helpers

Change-Id: I9fc4d3ee7992618b5b14e35166e848d6e1cffa8b
Signed-off-by: Edward O'Callaghan <eocallaghan@alterapraxis.com>
Reviewed-on: http://review.coreboot.org/5837
Tested-by: build bot (Jenkins)
Reviewed-by: Idwer Vollering <vidwer@gmail.com>
superio/ite/it8712f: Depreciate model specific early_serial.c

We now have common ite_*_*() functions for romstage and hence no longer
require the model specific portion of this superio support.

Change-Id: I30400abf27008a88072673075bba445f100d9ad3
Signed-off-by: Edward O'Callaghan <eocallaghan@alterapraxis.com>
Reviewed-on: http://review.coreboot.org/5838
Tested-by: build bot (Jenkins)
Reviewed-by: Idwer Vollering <vidwer@gmail.com>
superio/winbond/w83627uhg: Depreciate romstage component

Depreciate the model specific early_serial.c romstage component for this
Super I/O in favor of the recent generic winbond romstage framework.

Convert dependent board to generic winbond serial init. Note the clock
function is actually invalid since it never enters into PNP config mode
to twiddle the register. Further, 48MHz is the default (page 9 of
data-sheet) and so romstage.c need not do anything to the clock rate
hence why it presumably works with this invalid function.

Change-Id: I4706a1446c1b391b8390ac0361700ce6f15b9206
Signed-off-by: Edward O'Callaghan <eocallaghan@alterapraxis.com>
Reviewed-on: http://review.coreboot.org/5725
Tested-by: build bot (Jenkins)
Reviewed-by: Idwer Vollering <vidwer@gmail.com>
superio/winbond/w83627thg: Depreciate romstage component

Depreciate the model specific early_serial.c romstage component for this
Super I/O in favor of the recent generic winbond romstage framework.

Change-Id: I22775dc9b6341c8994d21591b7176abe4dd99911
Signed-off-by: Edward O'Callaghan <eocallaghan@alterapraxis.com>
Reviewed-on: http://review.coreboot.org/5724
Tested-by: build bot (Jenkins)
Reviewed-by: Idwer Vollering <vidwer@gmail.com>