[RFC] [PATCH] Add multiboot 2 capabilities

[Jerone Young]

This patch is to introduce multiboot 2 loading capabilities to grub2
for powerpc & i386-pc. This patch was more so started by Hollis
Blanchard getting multiboot 2 working for power pc and I added to it
and cleaned it up.

One of the ideas with this patch is to keep everything under one
command for the user. So instead of having a "multiboot2" & "module2"
command, I created a proxy like mechanism so that you have only one
command for both multiboot 1 & 2 ... "multiboot". This is where
"loader/multiboot_loader.c" comes from. I could have integrated things
more but I figure the current approach will less likely break
anything.

The other thing that this patch does is it begins to make the
multiboot 1 code a bit more architecture agnostic so IF someone wanted
to implement it on another architecture they can.

A bit of file moving around and definition renaming is also apart of
this patch. I have also taken the time to make sure that it does not
break multiboot 1 loading on i386-pc.

If you have any comments please try to make them by next Saturday
(July 14). If I don't hear any complaints or suggestions, I will check
the code into the repository as is. Sorry the patch is a little big.

Also I have don't have the change log entry in this patch :-).

Signed-off-by: Jerone Young <address@hidden>

multiboot_2_patch.diff
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