ARM: OMAP4: SMP: Update defconfig for OMAP4430

This patch updates omap_4430sdp_defconfig to add SMP and LOCAL_TIMER
support for OMAP4430 SDP platform.
Additionally the defconfig is made in sync with 2.6.30-rc7

Signed-off-by: Santosh Shilimkar <santosh.shilimkar@ti.com>