ARM: OMAP4: SMP: Add OMAP4430 SMP board files

This patch adds SMP platform files support for OMAP4430SDP. TI's OMAP4430
SOC is based on ARM Cortex-A9 SMP architecture. It's a dual core SOC
with GIC used for interrupt handling and SCU for cache coherency.

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