Kernel config

Hi folks

I did some work on a specific kernel config for old wrap systems and got
frustrated by 2 issues.

- despite my past advocacy for a difference based kernel config I found
it was not very practical and does not save time
- including kernel release information in the names of the config files
does IMHO help anything and is _not_ version tool friendly

So I would suggest to drop the diffing method and return to generic
config name, e.g.

- drop the diffes and use enter the specific configurations into git
- drop the kernel version in the config files and make them generic
(inside the various kernel source there is never a version mentioned in
the filenames.

cheers

ET