Tegra194: add support for multiple SMMU devices

This patch adds support for all three SMMU devices present on the SoC.

The following changes have been done:
    Add SMMU devices to the memory map
    Update register read and write functions

Change-Id: I0007b496d2ae7264f4fa9f605d4b0a15fa747a0f
Signed-off-by: Pritesh Raithatha <praithatha@nvidia.com>
diff --git a/plat/nvidia/tegra/include/t194/tegra_def.h b/plat/nvidia/tegra/include/t194/tegra_def.h
index 8e7b28c..7bdd975 100644
--- a/plat/nvidia/tegra/include/t194/tegra_def.h
+++ b/plat/nvidia/tegra/include/t194/tegra_def.h
@@ -219,7 +219,9 @@
 /*******************************************************************************
  * Tegra SMMU Controller constants
  ******************************************************************************/
-#define TEGRA_SMMU_BASE			0x10000000
+#define TEGRA_SMMU0_BASE		0x12000000
+#define TEGRA_SMMU1_BASE		0x11000000
+#define TEGRA_SMMU2_BASE		0x10000000
 
 /*******************************************************************************
  * Tegra TZRAM constants