Rename mcfserial.c. Update include header

Renamed mcfserial.c to mcfuart.c. Modified Makefile for mcfuart.o from mcfserial.o. Replace immap_5329.h and m5329.h to immap.h

Signed-off-by: TsiChungLiew <Tsi-Chung.Liew@freescale.com>
diff --git a/drivers/serial/Makefile b/drivers/serial/Makefile
index 2208a08..93c68dd 100644
--- a/drivers/serial/Makefile
+++ b/drivers/serial/Makefile
@@ -25,7 +25,7 @@
 
 LIB 	:= $(obj)libserial.a
 
-COBJS 	:= mcfserial.o
+COBJS 	:= mcfuart.o
 
 SRCS 	:= $(COBJS:.o=.c)
 OBJS 	:= $(addprefix $(obj),$(COBJS))