Tegra: Change Tegra20 to Tegra in common code, prep for T30

Convert TEGRA20_ defines to either TEGRA_ or NV_PA_ where appropriate.
Convert tegra20_ source file and function names to tegra_, also.

Upcoming Tegra30 port will use common code/defines/names where possible.

Signed-off-by: Tom Warren <twarren@nvidia.com>
Acked-by: Stephen Warren <swarren@nvidia.com>
diff --git a/include/configs/harmony.h b/include/configs/harmony.h
index 69857dd..e407ff4 100644
--- a/include/configs/harmony.h
+++ b/include/configs/harmony.h
@@ -34,15 +34,15 @@
 
 /* High-level configuration options */
 #define V_PROMPT		"Tegra20 (Harmony) # "
-#define CONFIG_TEGRA20_BOARD_STRING	"NVIDIA Harmony"
+#define CONFIG_TEGRA_BOARD_STRING	"NVIDIA Harmony"
 
 /* Board-specific serial config */
 #define CONFIG_SERIAL_MULTI
-#define CONFIG_TEGRA20_ENABLE_UARTD
+#define CONFIG_TEGRA_ENABLE_UARTD
 
 /* UARTD: keyboard satellite board UART, default */
 #define CONFIG_SYS_NS16550_COM1		NV_PA_APB_UARTD_BASE
-#ifdef CONFIG_TEGRA20_ENABLE_UARTA
+#ifdef CONFIG_TEGRA_ENABLE_UARTA
 /* UARTA: debug board UART */
 #define CONFIG_SYS_NS16550_COM2		NV_PA_APB_UARTA_BASE
 #endif
@@ -66,7 +66,7 @@
 #define CONFIG_CMD_NAND
 #define CONFIG_TEGRA_NAND
 #define CONFIG_SYS_MAX_NAND_DEVICE	1
-#define CONFIG_SYS_NAND_BASE	TEGRA20_NAND_BASE
+#define CONFIG_SYS_NAND_BASE	NV_PA_NAND_BASE
 
 /* Environment in NAND (which is 512M), aligned to start of last sector */
 #define CONFIG_ENV_IS_IN_NAND
@@ -87,6 +87,6 @@
 #define CONFIG_CMD_NET
 #define CONFIG_CMD_DHCP
 
-#include "tegra20-common-post.h"
+#include "tegra-common-post.h"
 
 #endif /* __CONFIG_H */