mpc52xx, digsy_mtc: protect default flash sectors

call flash_protect_default() to protect default sectors.

Signed-off-by: Heiko Schocher <hs@denx.de>
diff --git a/board/digsy_mtc/digsy_mtc.c b/board/digsy_mtc/digsy_mtc.c
index 79cb3f1..9f13a3d 100644
--- a/board/digsy_mtc/digsy_mtc.c
+++ b/board/digsy_mtc/digsy_mtc.c
@@ -42,6 +42,7 @@
 #if defined(CONFIG_DIGSY_REV5)
 #include "is45s16800a2.h"
 #include <mtd/cfi_flash.h>
+#include <flash.h>
 #else
 #include "is42s16800a-7t.h"
 #endif
@@ -398,6 +399,7 @@
 			size += flash_get_size(base, i);
 		}
 	}
+	flash_protect_default();
 	gd->bd->bi_flashstart = base;
 	return 0;
 }