[oe] Some updates for GeodeLX based devices

[Marcin Juszkiewicz]

As recently some useer on Angstrom-devel mailing list asked about state
of GeodeLX based devices in OE I decided to make it more up to date.

Result is this set of patches for review. I did not yet checked build
results on Alix.1c but this is planned for next few days.

[PATCH 1/6] Remove alix machine, update geodelx one to use Alix settings

This patch renames 'alix' machine to 'geodelx' which can be used by
anyone for other GeodeLX based devices.

[PATCH 2/6] kaeilos/sane-feed: remove alix, mark geodelx as i586

Fixed architecture settings for geodelx.

[PATCH 3/6] kaeilos.inc/sane-feed.inc: use spaces instead of tabs
[PATCH 4/6] kaeilos: use include/sane-feed.inc

Patch 2/6 looks strange when 4/6 is applied too but I wanted to make it
clean.

[PATCH 5/6] linux: drop alix, move geodelx to 2.6.29

GeodeLX machine in OE used 2.6.10 kernel which is deprecated in Ångström
(as our udev require at least 2.6.12 (if not .16 even)).

[PATCH 6/6] angstrom: use GCC 4.3.3 for Geode devices

GCC 4.3.3 has "-march=geode" which is used in tune-geode.inc so I bumped
it for Ångström. This is part of 'upgrade gcc/binutils' plan.