arm: vf610: Add uart support for Vybrid VF610

This patch adds lpuart support for Vybrid VF610 platform.

Signed-off-by: TsiChung Liew <tsicliew@gmail.com>
Signed-off-by: Alison Wang <b18965@freescale.com>
diff --git a/drivers/serial/Makefile b/drivers/serial/Makefile
index fbc4e97..bb6559b 100644
--- a/drivers/serial/Makefile
+++ b/drivers/serial/Makefile
@@ -52,6 +52,7 @@
 COBJS-$(CONFIG_SANDBOX_SERIAL) += sandbox.o
 COBJS-$(CONFIG_SCIF_CONSOLE) += serial_sh.o
 COBJS-$(CONFIG_ZYNQ_SERIAL) += serial_zynq.o
+COBJS-$(CONFIG_FSL_LPUART) += serial_lpuart.o
 
 ifndef CONFIG_SPL_BUILD
 COBJS-$(CONFIG_USB_TTY) += usbtty.o