Tegra186: move smmu driver to tegra/common

This patch moves the smmu driver introduced by the Tegra186 port
to tegra/common so that future chips can (re)use it.

Change-Id: Ia44c7f2a62fb2d8869db3a44742a8c6b13c49036
Signed-off-by: Varun Wadekar <vwadekar@nvidia.com>
diff --git a/plat/nvidia/tegra/include/t186/tegra_def.h b/plat/nvidia/tegra/include/t186/tegra_def.h
index 6bac0d7..4c99a7b 100644
--- a/plat/nvidia/tegra/include/t186/tegra_def.h
+++ b/plat/nvidia/tegra/include/t186/tegra_def.h
@@ -249,6 +249,8 @@
  * Tegra scratch registers constants
  ******************************************************************************/
 #define TEGRA_SCRATCH_BASE		0x0C390000
+#define  SECURE_SCRATCH_RSV1_LO		0x658
+#define  SECURE_SCRATCH_RSV1_HI		0x65C
 #define  SECURE_SCRATCH_RSV6		0x680
 #define  SECURE_SCRATCH_RSV11_LO	0x6A8
 #define  SECURE_SCRATCH_RSV11_HI	0x6AC