This library function should be in obj-y and not in lib-y.  But when we do
that it clashes unpleasantly with the assembly-language implementation in the
ia64 architecture.

Instead of trying to fix it all up, just remove the generic carta_random32 in
the expectation that the recently-made-generic random32() will suffice.

If/when perfmon is migrated to random32, ia64's private carta_random32
implementation can also be removed.

Cc: Stephane Eranian <eranian@hpl.hp.com>
Cc: "Luck, Tony" <tony.luck@intel.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>