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/yosemite.h b/include/configs/yosemite.h
index 891b515..cb2042c 100644
--- a/include/configs/yosemite.h
+++ b/include/configs/yosemite.h
@@ -105,7 +105,7 @@
  * FLASH related
  *----------------------------------------------------------------------*/
 #define CFG_FLASH_CFI				/* The flash is CFI compatible	*/
-#define CFG_FLASH_CFI_DRIVER			/* Use common CFI driver	*/
+#define CONFIG_FLASH_CFI_DRIVER			/* Use common CFI driver	*/
 #define CFG_FLASH_CFI_AMD_RESET 1		/* AMD RESET for STM 29W320DB!	*/
 
 #define CFG_MAX_FLASH_BANKS	1	/* max number of memory banks		*/