ARM: OMAP3: Defconfig for Zoom2 board

This patch adds OMAP3 Zoom2 board defconfig.
Signed-off-by: NMikkel Christensen <mlc@ti.com>
Signed-off-by: NVikram Pandita <vikram.pandita@ti.com>
Acked-by: NKevin Hilman <khilman@deeprootsystems.com>
Signed-off-by: NTony Lindgren <tony@atomide.com>