test: Allow running a selection of suites

Enhance the ut command to accept a comma-separated list of test suites
to run. Report the summary information for these at the end.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/test/test-main.c b/test/test-main.c
index ee855bf..cabc736 100644
--- a/test/test-main.c
+++ b/test/test-main.c
@@ -683,7 +683,7 @@
 void ut_report(struct ut_stats *stats, int run_count)
 {
 	if (run_count > 1)
-		printf("Total tests");
+		printf("Suites run: %d, total tests", run_count);
 	else
 		printf("Tests");
 	printf(" run: %d, ", stats->test_count);