__FIXADDR_TOP and PAGE_OFFSET are hardcoded in various places.  I had to
change it to run the kernel under qemu-fast, so I wanted to centralize
them.

To do this, we rename vsyscall.lds to vsyscall.lds.s, and generate it from
vsyscall.lds.S.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> (created)
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>