dm: test: Drop the special function for running DM tests

This is not needed since the flag takes care of all differences. Make use
of the common function.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/test/dm/test-dm.c b/test/dm/test-dm.c
index 66cc2bc..e73a1dd 100644
--- a/test/dm/test-dm.c
+++ b/test/dm/test-dm.c
@@ -4,55 +4,14 @@
  */
 
 #include <common.h>
-#include <command.h>
-#include <console.h>
-#include <dm.h>
-#include <errno.h>
-#include <log.h>
-#include <malloc.h>
-#include <asm/global_data.h>
-#include <asm/state.h>
-#include <dm/root.h>
-#include <dm/uclass-internal.h>
+#include <test/suites.h>
 #include <test/test.h>
-#include <test/test.h>
-#include <test/ut.h>
-
-DECLARE_GLOBAL_DATA_PTR;
 
-/**
- * dm_test_run() - Run driver model tests
- *
- * Run all the available driver model tests, or a selection
- *
- * @test_name: Name of single test to run (e.g. "dm_test_fdt_pre_reloc" or just
- *	"fdt_pre_reloc"), or NULL to run all
- * Return: 0 if all tests passed, 1 if not
- */
-static int dm_test_run(const char *test_name, int runs_per_text)
+int do_ut_dm(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
 {
 	struct unit_test *tests = UNIT_TEST_SUITE_START(dm_test);
 	const int n_ents = UNIT_TEST_SUITE_COUNT(dm_test);
-	int ret;
-
-	ret = ut_run_list("driver model", "dm_test_", tests, n_ents, test_name,
-			  runs_per_text, false);
-
-	return ret ? CMD_RET_FAILURE : 0;
-}
-
-int do_ut_dm(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
-{
-	const char *test_name = NULL;
-	int runs_per_text = 1;
-
-	if (argc > 1 && !strncmp("-r", argv[1], 2)) {
-		runs_per_text = dectoul(argv[1] + 2, NULL);
-		argv++;
-		argc++;
-	}
-	if (argc > 1)
-		test_name = argv[1];
 
-	return dm_test_run(test_name, runs_per_text);
+	return cmd_ut_category("driver model", "dm_test_", tests, n_ents, argc,
+			       argv);
 }