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/MPC832XEMDS.h b/include/configs/MPC832XEMDS.h
index 9ca2a2b..401d0af 100644
--- a/include/configs/MPC832XEMDS.h
+++ b/include/configs/MPC832XEMDS.h
@@ -166,7 +166,7 @@
  * FLASH on the Local Bus
  */
 #define CFG_FLASH_CFI		/* use the Common Flash Interface */
-#define CFG_FLASH_CFI_DRIVER	/* use the CFI driver */
+#define CONFIG_FLASH_CFI_DRIVER	/* use the CFI driver */
 #define CFG_FLASH_BASE		0xFE000000	/* FLASH base address */
 #define CFG_FLASH_SIZE		16	/* FLASH size is 16M */