Move PL01* serial drivers to drivers/serial and adjust Makefiles.
diff --git a/drivers/serial/Makefile b/drivers/serial/Makefile
index 93c68dd..40f3d67 100644
--- a/drivers/serial/Makefile
+++ b/drivers/serial/Makefile
@@ -25,7 +25,7 @@
 
 LIB 	:= $(obj)libserial.a
 
-COBJS 	:= mcfuart.o
+COBJS 	:= mcfuart.o serial_pl010.o serial_pl011.o
 
 SRCS 	:= $(COBJS:.o=.c)
 OBJS 	:= $(addprefix $(obj),$(COBJS))