Tegra30: Add common CPU (shared) files

These files are used by both SPL and main U-Boot.
Also made minor changes to shared Tegra code to support
T30 differences.

Signed-off-by: Tom Warren <twarren@nvidia.com>
Reviewed-by: Stephen Warren <swarren@nvidia.com>
diff --git a/arch/arm/cpu/tegra20-common/warmboot.c b/arch/arm/cpu/tegra20-common/warmboot.c
index 157b9ab..0d472cf 100644
--- a/arch/arm/cpu/tegra20-common/warmboot.c
+++ b/arch/arm/cpu/tegra20-common/warmboot.c
@@ -46,7 +46,7 @@
  * This is the place in SRAM where the SDRAM parameters are stored. There
  * are 4 blocks, one for each RAM code
  */
-#define SDRAM_PARAMS_BASE	(AP20_BASE_PA_SRAM + 0x188)
+#define SDRAM_PARAMS_BASE	(NV_PA_BASE_SRAM + 0x188)
 
 /* TODO: If we later add support for the Misc GP controller, refactor this */
 union xm2cfga_reg {