omap iommu: add MPU_BRIDGE_IOMMU for tidspbridge migration

Currently "tidspbridge" driver uses its own mmu implementation and
will migrate to use this "omap iommu" eventually. This config is
provided to make this migration happen smoothly.
Signed-off-by: NHiroshi DOYU <Hiroshi.DOYU@nokia.com>

arch/arm/mach-omap2/omap3-iommu.c

@@ -36,11 +36,13 @@ static const struct iommu_platform_data omap3_iommu_pdata[] __initconst = {
 		.nr_tlb_entries = 8,
 		.clk_name = "cam_ick",
 	},
+#if defined(CONFIG_MPU_BRIDGE_IOMMU)
 	{
 		.name = "iva2",
 		.nr_tlb_entries = 32,
 		.clk_name = "iva2_ck",
 	},
+#endif
 };
 #define NR_IOMMU_DEVICES ARRAY_SIZE(omap3_iommu_pdata)