external/xscom-utils: Add python library for xscom access
external/xscom-utils: Add python library for xscom access

Patch adds a simple python library module for xscom access.
It directly manipulate the '/access' file for scom read
and write from debugfs 'scom' directory.

Example on how to generate a getscom using this module:

	#!/usr/bin/python

	from adu_scoms import *
	getscom = GetSCom()
	getscom.parse_args()
	getscom.run_command()

Sample output for above getscom.py:

# ./getscom.py -l
Chip ID  | Rev   | Chip type
---------|-------|-----------
00000008 | DD2.0 | P9 (Nimbus) processor
00000000 | DD2.0 | P9 (Nimbus) processor

Signed-off-by: Madhavan Srinivasan <50c9fed97c2a760bbf32e7fdccf39ca6a997eabd@linux.vnet.ibm.com>
Signed-off-by: Stewart Smith <ec31ab75ddf977353c8f660f92ea8b23f64aef25@linux.ibm.com>

shenki/skiboot,legoater/skiboot,open-power/skiboot,qemu/skiboot,legoater/skiboot,open-power/skiboot,legoater/skiboot,shenki/skiboot,stewart-ibm/skiboot,qemu/skiboot,shenki/skiboot,shenki/skiboot,open-power/skiboot,qemu/skiboot,stewart-ibm/skiboot,legoater/skiboot,qemu/skiboot,open-power/skiboot,shenki/skiboot,legoater/skiboot,stewart-ibm/skiboot,qemu/skiboot,open-power/skiboot