sandbox: image: Adjust FIT image printing to work with sandbox

Use map_sysmem() to convert from address to pointer, so that sandbox can
print FIT information without crashing.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/common/image-fit.c b/common/image-fit.c
index 589f53d..7bf82d3 100644
--- a/common/image-fit.c
+++ b/common/image-fit.c
@@ -351,10 +351,13 @@
 
 #ifndef USE_HOSTCC
 	printf("%s  Data Start:   ", p);
-	if (ret)
+	if (ret) {
 		printf("unavailable\n");
-	else
-		printf("0x%08lx\n", (ulong)data);
+	} else {
+		void *vdata = (void *)data;
+
+		printf("0x%08lx\n", (ulong)map_to_sysmem(vdata));
+	}
 #endif
 
 	printf("%s  Data Size:    ", p);