Index: linux-2.6.21.7/drivers/mmc/at91_mci.c
===================================================================
--- linux-2.6.21.7.orig/drivers/mmc/at91_mci.c
+++ linux-2.6.21.7/drivers/mmc/at91_mci.c
@@ -79,8 +79,7 @@
 
 #define DRIVER_NAME "at91_mci"
 
-//#undef	SUPPORT_4WIRE
-#define 	SUPPORT_4WIRE
+#undef	SUPPORT_4WIRE
 
 #define FL_SENT_COMMAND	(1 << 0)
 #define FL_SENT_STOP	(1 << 1)