tegra20: rename tegra2 -> tegra20

This is make naming consistent with the kernel and devicetree and in
preparation of pulling out the common tegra20 code.

Signed-off-by: Allen Martin <amartin@nvidia.com>
Acked-by: Stephen Warren <swarren@wwwdotorg.org>
Tested-by: Thierry Reding <thierry.reding@avionic-design.de>
Signed-off-by: Tom Warren <twarren@nvidia.com>
diff --git a/drivers/gpio/tegra_gpio.c b/drivers/gpio/tegra_gpio.c
index 60ec6e3..8cfcf82 100644
--- a/drivers/gpio/tegra_gpio.c
+++ b/drivers/gpio/tegra_gpio.c
@@ -1,5 +1,5 @@
 /*
- * NVIDIA Tegra2 GPIO handling.
+ * NVIDIA Tegra20 GPIO handling.
  *  (C) Copyright 2010-2012
  *  NVIDIA Corporation <www.nvidia.com>
  *
@@ -30,14 +30,14 @@
 #include <common.h>
 #include <asm/io.h>
 #include <asm/bitops.h>
-#include <asm/arch/tegra2.h>
+#include <asm/arch/tegra20.h>
 #include <asm/gpio.h>
 
 enum {
-	TEGRA2_CMD_INFO,
-	TEGRA2_CMD_PORT,
-	TEGRA2_CMD_OUTPUT,
-	TEGRA2_CMD_INPUT,
+	TEGRA20_CMD_INFO,
+	TEGRA20_CMD_PORT,
+	TEGRA20_CMD_OUTPUT,
+	TEGRA20_CMD_INPUT,
 };
 
 static struct gpio_names {