Add function for VDAT processing.

Add function for VDAT processing.

This CL is a user space counterpart of
http://codereview.chromium.org/6690023, which provided the
ability to retrieve buffers through chromeos_acpi driver.

The buffer contents is communicated as a multi line string
with each buffer byte represented as a two symbol hex 
number. `crosstool', on the other has to map the buffer
contents into a certain binary structure. This CL add
conversion of the multiline string into a binary buffer and
also adds a temp. routine to dump the buffer contents on the
screen when `crosstool' is invoked.

Change-Id: I8dd3eb935332f9bc8769c71de0db302365f12d70

BUG=chromium-os:13069, chromium-os:13091
TEST=manual

- Install the new image on a target with firmware providing
 the VDAT ACPI method.

- Run crosstool and watch for the last line:
vdat                   =  11 22 33 44 ff 1f 1c 40 ff 57 74 41 ff ff ff ff # Raw VDAT contents.
localhost tmp #

Committed: http://chrome-svn/viewvc/chromeos?view=rev&revision=2008423

[Randall Spangler, 2011-03-15 05:32:16]

LGTM; minor nits.

http://codereview.chromium.org/6695012/diff/2001/host/lib/crossystem.c
File host/lib/crossystem.c (right):

http://codereview.chromium.org/6695012/diff/2001/host/lib/crossystem.c#newcod...
host/lib/crossystem.c:315: FILE *f = NULL;
Shouldn't these be 'FILE* f'?

http://codereview.chromium.org/6695012/diff/2001/host/lib/crossystem.c#newcod...
host/lib/crossystem.c:677: *  string. It is expected to be replaced with
afunction which has knowledge
a function

[vb, 2011-03-15 16:31:30]

committed

http://codereview.chromium.org/6695012/diff/2001/host/lib/crossystem.c
File host/lib/crossystem.c (right):

http://codereview.chromium.org/6695012/diff/2001/host/lib/crossystem.c#newcod...
host/lib/crossystem.c:315: FILE *f = NULL;
On 2011/03/15 05:32:16, Randall Spangler wrote:
> Shouldn't these be 'FILE* f'?

changed to match the file style.

http://codereview.chromium.org/6695012/diff/2001/host/lib/crossystem.c#newcod...
host/lib/crossystem.c:677: *  string. It is expected to be replaced with
afunction which has knowledge
On 2011/03/15 05:32:16, Randall Spangler wrote:
> a function

Done.