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/ep8248.h b/include/configs/ep8248.h
index 8a220b6..ccc0d5d 100644
--- a/include/configs/ep8248.h
+++ b/include/configs/ep8248.h
@@ -186,7 +186,7 @@
 
 #define CFG_FLASH_BASE		0xFF800000
 #define CFG_FLASH_CFI
-#define CFG_FLASH_CFI_DRIVER
+#define CONFIG_FLASH_CFI_DRIVER
 #define CFG_MAX_FLASH_BANKS	1	/* max num of flash banks	*/
 #define CFG_MAX_FLASH_SECT	256	/* max num of sects on one chip */