serial: move CFG_SCIF_CONSOLE to CONFIG_SCIF_CONSOLE

move also conditional compilation to Makefile

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
diff --git a/drivers/serial/Makefile b/drivers/serial/Makefile
index de6fbab..3716974 100644
--- a/drivers/serial/Makefile
+++ b/drivers/serial/Makefile
@@ -35,7 +35,7 @@
 COBJS-y += serial_pl010.o
 COBJS-y += serial_pl011.o
 COBJS-$(CONFIG_XILINX_UARTLITE) += serial_xuartlite.o
-COBJS-y += serial_sh.o
+COBJS-$(CONFIG_SCIF_CONSOLE) += serial_sh.o
 COBJS-$(CONFIG_USB_TTY) += usbtty.o
 
 COBJS	:= $(COBJS-y)