serial: Add Tegra2 serial port support

Signed-off-by: Tom Warren <twarren@nvidia.com>
diff --git a/drivers/serial/Makefile b/drivers/serial/Makefile
index 7d221fc..5a6011e 100644
--- a/drivers/serial/Makefile
+++ b/drivers/serial/Makefile
@@ -55,6 +55,7 @@
 COBJS-$(CONFIG_S3C44B0_SERIAL) += serial_s3c44b0.o
 COBJS-$(CONFIG_XILINX_UARTLITE) += serial_xuartlite.o
 COBJS-$(CONFIG_SCIF_CONSOLE) += serial_sh.o
+COBJS-$(CONFIG_TEGRA2) += serial_tegra2.o
 COBJS-$(CONFIG_USB_TTY) += usbtty.o
 
 COBJS	:= $(sort $(COBJS-y))