Tegra: no need to re-init the same console

This patch stops initialising the same UART console, as a "crash"
console. The normal and the crash consoles use the same UART port
and hence the crash console init function now only checks if the
console is ready to be used.

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

plat/nvidia/tegra/common/aarch64/tegra_helpers.S

@@ -243,11 +243,12 @@ endfunc platform_mem_init
 	 * ---------------------------------------------
 	 */
 func plat_crash_console_init
-	adr	x0, tegra_console_base
-	ldr	x0, [x0]
-	mov_imm	x1, TEGRA_BOOT_UART_CLK_IN_HZ
-	mov_imm	x2, TEGRA_CONSOLE_BAUDRATE
-	b	console_core_init
+	mov	x0, #0
+	adr	x1, tegra_console_base
+	ldr	x1, [x1]
+	cbz	x1, 1f
+	mov	w0, #1
+1:	ret
 endfunc plat_crash_console_init
 
 	/* ---------------------------------------------

plat/nvidia/tegra/common/tegra_bl31_setup.c

@@ -202,9 +202,6 @@ void bl31_early_platform_setup(bl31_params_t *from_bl2,
 		 */
 		console_init(tegra_console_base, TEGRA_BOOT_UART_CLK_IN_HZ,
 			TEGRA_CONSOLE_BAUDRATE);
-
-		/* Initialise crash console */
-		plat_crash_console_init();
 	}
 
 	/*