Move deprecated Kconfig options to their own file,

Move deprecated Kconfig options to their own file,
so it's clear that they should be gone.
More can (and should) be added, but this is a start.

Of course, eliminating the uses of the flags (and then
the flags themselves) that are in Kconfig.deprecated_options
is a noble task for the future :-)

Signed-off-by: Patrick Georgi <patrick.georgi@coresystems.de>
Acked-by: Stefan Reinauer <stepan@coresystems.de>
git-svn-id: svn://svn.coreboot.org/coreboot/trunk@5209 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1