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/MigoR.h b/include/configs/MigoR.h
index ffa9b54..40cf275 100644
--- a/include/configs/MigoR.h
+++ b/include/configs/MigoR.h
@@ -103,7 +103,7 @@
 
 /* FLASH */
 #define CFG_FLASH_CFI
-#define CFG_FLASH_CFI_DRIVER
+#define CONFIG_FLASH_CFI_DRIVER
 #undef  CFG_FLASH_QUIET_TEST
 /* print 'E' for empty sector on flinfo */
 #define CFG_FLASH_EMPTY_INFO