Tegra: add platform specific 'runtime_setup' handler

Tegra SoCs would like the flexibility to perform chip specific actions
before we complete cold boot. This patch introduces a platform specific
'runtime_setup' handler to provide that flexibility.

Change-Id: I13b2489f631f775cae6f92acf51a240cd036ef11
Signed-off-by: Kalyani Chidambaram Vaidyanathan <kalyanic@nvidia.com>
diff --git a/plat/nvidia/tegra/include/tegra_private.h b/plat/nvidia/tegra/include/tegra_private.h
index f1a4948..cc2ad86 100644
--- a/plat/nvidia/tegra/include/tegra_private.h
+++ b/plat/nvidia/tegra/include/tegra_private.h
@@ -87,6 +87,7 @@
 void plat_late_platform_setup(void);
 void plat_relocate_bl32_image(const image_info_t *bl32_img_info);
 bool plat_supports_system_suspend(void);
+void plat_runtime_setup(void);
 
 /* Declarations for plat_secondary.c */
 void plat_secondary_setup(void);