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/ep82xxm.h b/include/configs/ep82xxm.h
index ac5847c..ac68c86 100644
--- a/include/configs/ep82xxm.h
+++ b/include/configs/ep82xxm.h
@@ -202,7 +202,7 @@
  *----------------------------------------------------------------------*/
 #define CFG_FLASH_BASE		0xFC000000
 #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	512	/* max num of sects on one chip */
 #define CFG_FLASH_EMPTY_INFO		/* print 'E' for empty sector in flinfo */