rename CFG_ENV macros to CONFIG_ENV

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
diff --git a/board/purple/flash.c b/board/purple/flash.c
index ee8a60e..640bc29 100644
--- a/board/purple/flash.c
+++ b/board/purple/flash.c
@@ -240,9 +240,9 @@
 #ifdef	CONFIG_ENV_IS_IN_FLASH
 	/* ENV protection ON by default */
 	flash_protect(FLAG_PROTECT_SET,
-		      CFG_ENV_ADDR,
-		      CFG_ENV_ADDR+CFG_ENV_SIZE-1,
-		      flash_get_info(CFG_ENV_ADDR));
+		      CONFIG_ENV_ADDR,
+		      CONFIG_ENV_ADDR+CONFIG_ENV_SIZE-1,
+		      flash_get_info(CONFIG_ENV_ADDR));
 #endif
 
 	return size;