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/trizepsiv.h b/include/configs/trizepsiv.h
index f77dd14..6367f87 100644
--- a/include/configs/trizepsiv.h
+++ b/include/configs/trizepsiv.h
@@ -293,7 +293,7 @@
  */
 
 #define CFG_FLASH_CFI
-#define CFG_FLASH_CFI_DRIVER	1
+#define CONFIG_FLASH_CFI_DRIVER	1
 
 #define CFG_MONITOR_BASE	0
 #define CFG_MONITOR_LEN		0x40000