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/ppmc8260.h b/include/configs/ppmc8260.h
index dee6643..6f1195b 100644
--- a/include/configs/ppmc8260.h
+++ b/include/configs/ppmc8260.h
@@ -452,7 +452,7 @@
  */
 
 #define CFG_FLASH_CFI		1	/* Flash is CFI conformant		*/
-#define CFG_FLASH_CFI_DRIVER	1	/* Use the common driver		*/
+#define CONFIG_FLASH_CFI_DRIVER	1	/* Use the common driver		*/
 #define CFG_MAX_FLASH_SECT	128	/* max number of sectors on one chip	*/
 #define CFG_MAX_FLASH_BANKS	1	/* max number of memory banks		*/
 #define CFG_FLASH_INCREMENT	0	/* there is only one bank		*/