rename CFG_ macros to CONFIG_SYS

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
diff --git a/board/purple/sconsole.c b/board/purple/sconsole.c
index f52d50d..cd9d871 100644
--- a/board/purple/sconsole.c
+++ b/board/purple/sconsole.c
@@ -38,7 +38,7 @@
 
 	sb->pos  = 0;
 	sb->size = 0;
-	sb->max_size = CFG_SCONSOLE_SIZE - sizeof (sconsole_buffer_t);
+	sb->max_size = CONFIG_SYS_SCONSOLE_SIZE - sizeof (sconsole_buffer_t);
 
 	return (0);
 }