drivers/mtd: Move conditional compilation to Makefile

rename CFG_FLASH_CFI_DRIVER to CONFIG_FLASH_CFI_DRIVER

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
diff --git a/include/configs/mgcoge.h b/include/configs/mgcoge.h
index 59ff96b..5fe3075 100644
--- a/include/configs/mgcoge.h
+++ b/include/configs/mgcoge.h
@@ -153,7 +153,7 @@
 #define CFG_FLASH_BASE		0xFE000000
 #define CFG_FLASH_SIZE		32
 #define CFG_FLASH_CFI
-#define CFG_FLASH_CFI_DRIVER
+#define CONFIG_FLASH_CFI_DRIVER
 #define CFG_MAX_FLASH_BANKS	2	/* max num of flash banks	*/
 #define CFG_MAX_FLASH_SECT	512	/* max num of sects on one chip */