x86, vmlinux.lds: unify percpu

32 bit:
- move __init_end outside the .bss output section
  It really did not belong in there

[ Impact: 64-bit: cleanup, 32-bit: refactor linker script ]

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Cc: Tim Abbott <tabbott@MIT.EDU>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
LKML-Reference: <1240991249-27117-12-git-send-email-sam@ravnborg.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>