[PATCH] time.h: remove ifdefs

Remove these ifdefs - there's no need to have more than one definition of
these multipliers anywhere.

Cc: Nishanth Aravamudan <nacc@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>