MMC: MXS: Toggle the generic bounce buffer on the boards

Flip the boards to use the generic bounce buffer instead of the
MMC one.

Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Andy Fleming <afleming@freescale.com>
Cc: Fabio Estevam <festevam@gmail.com>
Signed-off-by: Andy Fleming <afleming@freescale.com>
diff --git a/include/configs/mx28evk.h b/include/configs/mx28evk.h
index 7cdbec6..1443833 100644
--- a/include/configs/mx28evk.h
+++ b/include/configs/mx28evk.h
@@ -142,7 +142,7 @@
 #ifdef	CONFIG_CMD_MMC
 #define CONFIG_MMC
 #define CONFIG_GENERIC_MMC
-#define CONFIG_MMC_BOUNCE_BUFFER
+#define CONFIG_BOUNCE_BUFFER
 #define CONFIG_MXS_MMC
 #endif