mmc: tegra2: rename tegra2_mmc.* to tegra_mmc.*

In anticipation of Tegra3 support, continue removing/renaming
Tegra2-specific files. No functional changes (yet).
Updated copyrights to 2012.

Signed-off-by: Tom Warren <twarren@nvidia.com>
diff --git a/drivers/mmc/Makefile b/drivers/mmc/Makefile
index a8e681c..c567737 100644
--- a/drivers/mmc/Makefile
+++ b/drivers/mmc/Makefile
@@ -42,7 +42,7 @@
 COBJS-$(CONFIG_SDHCI) += sdhci.o
 COBJS-$(CONFIG_S5P_SDHCI) += s5p_sdhci.o
 COBJS-$(CONFIG_SH_MMCIF) += sh_mmcif.o
-COBJS-$(CONFIG_TEGRA2_MMC) += tegra2_mmc.o
+COBJS-$(CONFIG_TEGRA_MMC) += tegra_mmc.o
 
 COBJS	:= $(COBJS-y)
 SRCS	:= $(COBJS:.o=.c)