[PATCH] EDAC config cleanup

The AMD76x chipsets aren't used in 64-bit, so don't offer the driver to the
user.

Signed-off-by: Dave Jones <davej@redhat.com>
Acked-by: Alan Cox <alan@redhat.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>