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/apollon.h b/include/configs/apollon.h
index 5884611..c93e77a 100644
--- a/include/configs/apollon.h
+++ b/include/configs/apollon.h
@@ -215,7 +215,7 @@
  * CFI FLASH driver setup
  */
 # define	CFG_FLASH_CFI	1	/* Flash memory is CFI compliant */
-# define	CFG_FLASH_CFI_DRIVER	1	/* Use drivers/cfi_flash.c */
+# define	CONFIG_FLASH_CFI_DRIVER	1	/* Use drivers/cfi_flash.c */
 /* #define CFG_FLASH_USE_BUFFER_WRITE 1 */ /* Use buffered writes (~10x faster) */
 # define	CFG_FLASH_PROTECTION	1	/* Use h/w sector protection*/