sandbox: Create a new sandbox_noinst build

Move sandbox_spl over to use OF_PLATDATA_INST. Create a new board to
test the case when this is not enabled, since we will be keeping that
code around for several months and want to avoid regressions.

Skip the dm_test_of_plat_dev() test since driver info is not available
for OF_PLATDATA_INST.

Signed-off-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/test/dm/of_platdata.c b/test/dm/of_platdata.c
index 7cbb116..f2b45b9 100644
--- a/test/dm/of_platdata.c
+++ b/test/dm/of_platdata.c
@@ -146,6 +146,10 @@
 	bool found[n_ents];
 	uint i;
 
+	/* Skip this test if there is no platform data */
+	if (CONFIG_IS_ENABLED(OF_PLATDATA_INST))
+		return 0;
+
 	/* Record the indexes that are found */
 	memset(found, '\0', sizeof(found));
 	ut_assertok(find_driver_info(uts, gd->dm_root, found));