[PATCH] Clean up head.S whitespace

The whitespace in arch/ppc64/kernel/head.S is a bit all over the place. 
This patch fixes it up.  This patch changes nothing other than
whitespace. 
Signed-off-by: Paul Mackerras <paulus@samba.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>