spi: tegra2: rename tegra2_spi.* to tegra_spi.*

In anticipation of Tegra3 support, start removing/renaming
Tegra2-specific files. No functional changes (yet).
Also updated copyright to 2012.

Signed-off-by: Tom Warren <twarren@nvidia.com>
diff --git a/board/nvidia/common/uart-spi-switch.c b/board/nvidia/common/uart-spi-switch.c
index 1ba1afd..307937a 100644
--- a/board/nvidia/common/uart-spi-switch.c
+++ b/board/nvidia/common/uart-spi-switch.c
@@ -25,7 +25,7 @@
 #include <asm/arch/pinmux.h>
 #include <asm/arch/uart-spi-switch.h>
 #include <asm/arch/tegra2.h>
-#include <asm/arch/tegra2_spi.h>
+#include <asm/arch/tegra_spi.h>
 
 
 /* position of the UART/SPI select switch */