sh: Moved driver of the SuperH dependence

The composition of the directory in the drivers/ changed.
I moved SuperH serial driver and marubun PCMCIA driver.

Signed-off-by: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
diff --git a/drivers/serial/Makefile b/drivers/serial/Makefile
index 735c630..ee2b780 100644
--- a/drivers/serial/Makefile
+++ b/drivers/serial/Makefile
@@ -35,6 +35,7 @@
 COBJS-y += serial_pl010.o
 COBJS-y += serial_pl011.o
 COBJS-y += serial_xuartlite.o
+COBJS-y += serial_sh.o
 COBJS-y += usbtty.o
 
 COBJS	:= $(COBJS-y)