Create drivers/mmc subdirectory

In order to consolidate more of the various MMC drivers around the
tree, we must first have a common place to put them.

Signed-off-by: Haavard Skinnemoen <haavard.skinnemoen@atmel.com>
Acked-by: Jean-Chritophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
diff --git a/Makefile b/Makefile
index ac3f98f..6a734d1 100644
--- a/Makefile
+++ b/Makefile
@@ -220,6 +220,7 @@
 LIBS += drivers/i2c/libi2c.a
 LIBS += drivers/input/libinput.a
 LIBS += drivers/misc/libmisc.a
+LIBS += drivers/mmc/libmmc.a
 LIBS += drivers/mtd/libmtd.a
 LIBS += drivers/mtd/nand/libnand.a
 LIBS += drivers/mtd/nand_legacy/libnand_legacy.a
@@ -387,6 +388,7 @@
 TAG_SUBDIRS += drivers/i2c
 TAG_SUBDIRS += drivers/input
 TAG_SUBDIRS += drivers/misc
+TAG_SUBDIRS += drivers/mmc
 TAG_SUBDIRS += drivers/mtd
 TAG_SUBDIRS += drivers/mtd/nand
 TAG_SUBDIRS += drivers/mtd/nand_legacy