Bloblist request

[Simon Glass]

Hi Tom,

Bloblist is IMO a bit of a mess, with 2-3 maintainers who don't agree
on the direction.

You have requested that I:
- implement a handoff protocol for x86 in the spec
- do the same in the code
- convert x86 boards to use OF_BLOBLIST
- remove BLOBLIST_FIXED

I also want to enable VBE, which would require further work. I'm
sending a v4 today.

I am willing to do the above, but to do so, I want to make bloblist a
first-class citizen, available on any arch, built into global_data,
with no reliance on weak functions.

Please can you allow me to maintain bloblist?

Thanks,
Simon