imx31: move serial driver to drivers/serial

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>

cpu/arm1136/mx31/Makefile

diff --git a/cpu/arm1136/mx31/Makefile b/cpu/arm1136/mx31/Makefile
index b648ffd..0e06f0a 100644
--- a/cpu/arm1136/mx31/Makefile
+++ b/cpu/arm1136/mx31/Makefile
@@ -25,7 +25,7 @@
 
 LIB	= $(obj)lib$(SOC).a
 
-COBJS	= interrupts.o serial.o generic.o
+COBJS	= interrupts.o generic.o
 
 SRCS	:= $(SOBJS:.o=.S) $(COBJS:.o=.c)
 OBJS	:= $(addprefix $(obj),$(SOBJS) $(COBJS))

drivers/serial/Makefile

diff --git a/drivers/serial/Makefile b/drivers/serial/Makefile
index e76a2ad..619d9da 100644
--- a/drivers/serial/Makefile
+++ b/drivers/serial/Makefile
@@ -35,6 +35,7 @@
 COBJS-$(CONFIG_SYS_NS16550_SERIAL) += serial.o
 COBJS-$(CONFIG_IXP_SERIAL) += serial_ixp.o
 COBJS-$(CONFIG_MAX3100_SERIAL) += serial_max3100.o
+COBJS-$(CONFIG_MX31_UART) += serial_mx31.o
 COBJS-$(CONFIG_NETARM_SERIAL) += serial_netarm.o
 COBJS-$(CONFIG_PL010_SERIAL) += serial_pl01x.o
 COBJS-$(CONFIG_PL011_SERIAL) += serial_pl01x.o

drivers/serial/serial_mx31.c

diff --git a/cpu/arm1136/mx31/serial.c b/drivers/serial/serial_mx31.c
similarity index 98%
rename from cpu/arm1136/mx31/serial.c
rename to drivers/serial/serial_mx31.c
index e025e94..7c0682a 100644
--- a/cpu/arm1136/mx31/serial.c
+++ b/drivers/serial/serial_mx31.c
@@ -18,9 +18,6 @@
  */
 
 #include <common.h>
-
-#if defined CONFIG_MX31_UART
-
 #include <asm/arch/mx31.h>
 
 #define __REG(x)     (*((volatile u32 *)(x)))
@@ -227,6 +224,3 @@
 
 	return 0;
 }
-
-
-#endif /* CONFIG_MX31 */