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/kb9202.h b/include/configs/kb9202.h
index 7dcce83..e775e60 100644
--- a/include/configs/kb9202.h
+++ b/include/configs/kb9202.h
@@ -153,7 +153,7 @@
 #define CFG_MAXARGS		16		/* max number of command args */
 #define CFG_PBSIZE		(CFG_CBSIZE+sizeof(CFG_PROMPT)+16) /* Print Buffer Size */
 
-#define	CFG_FLASH_CFI_DRIVER
+#define	CONFIG_FLASH_CFI_DRIVER
 #define	CFG_FLASH_CFI
 
 #ifndef __ASSEMBLY__