This adds architecture-specific Kconfig support, plus Kconfig_i386 and
Kconfig_x86_64.  Currently the only option defined there is CONFIG_64_BIT.
Signed-off-by: Jeff Dike <jdike@addtoit.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>