[oe] RFC: MACHINE_ namespace

[Marcin Juszkiewicz]

During usage of progear device (now packed due to lack of space) I found 
a problems related to how we use machine configs and X11.

1. We have "alsa" as one of machine features but no way to control kernel 
modules for it - all are added into machine config as 
MACHINE_EXTRA_RRECOMMENDS. Same goes to other features.

2. Progear device use X.org instead of KDrive so I had to create own 
images for it because by default we do not have a way to tell which X 
drivers need to be present in images.


Proposed solution is adding MACHINE_ namespaces:

MACHINE_KERNEL_ALSA   = "kernel-module-snd-ali5451"
MACHINE_KERNEL_PCMCIA = "kernel-module-yenta-socket"

And other MACHINE_KERNEL_feature to control stuff used in task-base.

MACHINE_X11_SERVER  = "xserver-xorg"
MACHINE_X11_DRIVERS = "xf86-video-siliconmotion xf86-input-mutouch"

MACHINE_X11_SERVER will replace XSERVER used now, MACHINE_X11_DRIVERS will 
allow to add needed drivers to X11 images for device without creating 
custom ones.

What do you think about this proposal?

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