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/arch/arm/include/asm/arch-tegra20/tegra20.h b/arch/arm/include/asm/arch-tegra20/tegra20.h
index b2fb50e..c9485a1 100644
--- a/arch/arm/include/asm/arch-tegra20/tegra20.h
+++ b/arch/arm/include/asm/arch-tegra20/tegra20.h
@@ -33,22 +33,22 @@
 #define NV_PA_GPIO_BASE		0x6000D000
 #define NV_PA_EVP_BASE		0x6000F000
 #define NV_PA_APB_MISC_BASE	0x70000000
-#define TEGRA20_APB_MISC_GP_BASE (NV_PA_APB_MISC_BASE + 0x0800)
+#define NV_PA_APB_MISC_GP_BASE	(NV_PA_APB_MISC_BASE + 0x0800)
 #define NV_PA_APB_UARTA_BASE	(NV_PA_APB_MISC_BASE + 0x6000)
 #define NV_PA_APB_UARTB_BASE	(NV_PA_APB_MISC_BASE + 0x6040)
 #define NV_PA_APB_UARTC_BASE	(NV_PA_APB_MISC_BASE + 0x6200)
 #define NV_PA_APB_UARTD_BASE	(NV_PA_APB_MISC_BASE + 0x6300)
 #define NV_PA_APB_UARTE_BASE	(NV_PA_APB_MISC_BASE + 0x6400)
-#define TEGRA20_NAND_BASE	(NV_PA_APB_MISC_BASE + 0x8000)
-#define TEGRA20_SPI_BASE	(NV_PA_APB_MISC_BASE + 0xC380)
-#define TEGRA20_PMC_BASE	(NV_PA_APB_MISC_BASE + 0xE400)
-#define TEGRA20_FUSE_BASE	(NV_PA_APB_MISC_BASE + 0xF800)
+#define NV_PA_NAND_BASE		(NV_PA_APB_MISC_BASE + 0x8000)
+#define NV_PA_SPI_BASE		(NV_PA_APB_MISC_BASE + 0xC380)
+#define NV_PA_PMC_BASE		(NV_PA_APB_MISC_BASE + 0xE400)
+#define NV_PA_FUSE_BASE		(NV_PA_APB_MISC_BASE + 0xF800)
 #define NV_PA_CSITE_BASE	0x70040000
 #define TEGRA_USB1_BASE		0xC5000000
 #define TEGRA_USB3_BASE		0xC5008000
 #define TEGRA_USB_ADDR_MASK	0xFFFFC000
 
-#define TEGRA20_SDRC_CS0	NV_PA_SDRAM_BASE
+#define NV_PA_SDRC_CS0		NV_PA_SDRAM_BASE
 #define LOW_LEVEL_SRAM_STACK	0x4000FFFC
 #define EARLY_AVP_STACK		(NV_PA_SDRAM_BASE + 0x20000)
 #define EARLY_CPU_STACK		(EARLY_AVP_STACK - 4096)
@@ -86,7 +86,7 @@
 };
 
 #else  /* __ASSEMBLY__ */
-#define PRM_RSTCTRL		TEGRA20_PMC_BASE
+#define PRM_RSTCTRL		NV_PA_PMC_BASE
 #endif
 
 #endif	/* TEGRA20_H */