Tegra: enable runtime console

This patch enables the runtime console for all Tegra platforms
before exiting BL31. This would enable debug/error prints to be
always displayed on the UART console.

Change-Id: Ic48d61d05b0ab07973d6fc2dc6b68733a42a3f63
Signed-off-by: Varun Wadekar <vwadekar@nvidia.com>

plat/nvidia/tegra/common/tegra_bl31_setup.c

 /*
- * Copyright (c) 2015, ARM Limited and Contributors. All rights reserved.
+ * Copyright (c) 2015-2016, ARM Limited and Contributors. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are met:
@@ -193,6 +193,16 @@ void bl31_platform_setup(void)
 	INFO("BL3-1: Tegra platform setup complete\n");
 }
 
+/*******************************************************************************
+ * Perform any BL3-1 platform runtime setup prior to BL3-1 cold boot exit
+ ******************************************************************************/
+void bl31_plat_runtime_setup(void)
+{
+	/* Initialize the runtime console */
+	console_init(tegra_console_base, TEGRA_BOOT_UART_CLK_IN_HZ,
+		TEGRA_CONSOLE_BAUDRATE);
+}
+
 /*******************************************************************************
  * Perform the very early platform specific architectural setup here. At the
  * moment this only intializes the mmu in a quick and dirty way.