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/MPC8560ADS.h b/include/configs/MPC8560ADS.h
index 27212162..3567d1ce 100644
--- a/include/configs/MPC8560ADS.h
+++ b/include/configs/MPC8560ADS.h
@@ -148,7 +148,7 @@
 #undef  CFG_RAMBOOT
 #endif
 
-#define CFG_FLASH_CFI_DRIVER
+#define CONFIG_FLASH_CFI_DRIVER
 #define CFG_FLASH_CFI
 #define CFG_FLASH_EMPTY_INFO