tegra: Allow board-specific init

Add a hook to allows boards to add their own init to board_init().

Signed-off-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Tom Warren <twarren@nvidia.com>

arch/arm/include/asm/arch-tegra/sys_proto.h

@@ -25,4 +25,11 @@ int tegra_board_id(void);
  */
 int tegra_lcd_pmic_init(int board_id);
 
+/**
+ * nvidia_board_init() - perform any board-specific init
+ *
+ * @return 0 if OK, -ve on error
+ */
+int nvidia_board_init(void);
+
 #endif

arch/arm/mach-tegra/board2.c

@@ -107,6 +107,11 @@ __weak int tegra_lcd_pmic_init(int board_it)
 	return 0;
 }
 
+__weak int nvidia_board_init(void)
+{
+	return 0;
+}
+
 /*
  * Routine: board_init
  * Description: Early hardware init.
@@ -180,8 +185,7 @@ int board_init(void)
 	/* prepare the WB code to LP0 location */
 	warmboot_prepare_code(TEGRA_LP0_ADDR, TEGRA_LP0_SIZE);
 #endif
-
-	return 0;
+	return nvidia_board_init();
 }
 
 #ifdef CONFIG_BOARD_EARLY_INIT_F