[PATCH] random: Static allocation of pools

As we no longer allow resizing of pools, it makes sense to allocate and
initialize them statically.  Remove create_entropy_store and simplify
rand_initialize.
Signed-off-by: Matt Mackall <mpm@selenic.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>