ARM: fix HAVE_ARM_TWD selection for OMAP and shmobile

The selection of HAVE_ARM_TWD for OMAP and shmobile depend on LOCAL_TIMER
which no longer exists. They should depend on SMP instead.

Cc: Tony Lindgren <tony@atomide.com>
Cc: Simon Horman <horms@verge.net.au>
Cc: Magnus Damm <magnus.damm@gmail.com>
Signed-off-by: Rob Herring <robh@kernel.org>
Signed-off-by: Olof Johansson <olof@lixom.net>