mmc: Move atmel_mci driver into drivers/mmc

This makes it easier to use the driver on other platforms.

Signed-off-by: Haavard Skinnemoen <haavard.skinnemoen@atmel.com>
Acked-by: Jean-Chritophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
diff --git a/drivers/mmc/Makefile b/drivers/mmc/Makefile
index db92424..3dc031b 100644
--- a/drivers/mmc/Makefile
+++ b/drivers/mmc/Makefile
@@ -25,6 +25,8 @@
 
 LIB	:= $(obj)libmmc.a
 
+COBJS-$(CONFIG_ATMEL_MCI) += atmel_mci.o
+
 COBJS	:= $(COBJS-y)
 SRCS	:= $(COBJS:.o=.c)
 OBJS	:= $(addprefix $(obj),$(COBJS))