test: Rename unit-test flags

The UT_TESTF_ macros read as 'unit test test flags' which is not right.
Rename to UTF ('unit test flags').

This has the benefit of being shorter, which helps keep UNIT_TEST()
declarations on a single line.

Give the enum a name and reference it from the UNIT_TEST() macros while
we are here.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/test/dm/part.c b/test/dm/part.c
index cabb31d..c5c4b3f 100644
--- a/test/dm/part.c
+++ b/test/dm/part.c
@@ -93,7 +93,7 @@
 	env_set("bootdevice", oldbootdevice);
 	return ret;
 }
-DM_TEST(dm_test_part, UT_TESTF_SCAN_PDATA | UT_TESTF_SCAN_FDT);
+DM_TEST(dm_test_part, UTF_SCAN_PDATA | UTF_SCAN_FDT);
 
 static int dm_test_part_bootable(struct unit_test_state *uts)
 {
@@ -106,7 +106,7 @@
 
 	return 0;
 }
-DM_TEST(dm_test_part_bootable, UT_TESTF_SCAN_FDT);
+DM_TEST(dm_test_part_bootable, UTF_SCAN_FDT);
 
 static int do_get_info_test(struct unit_test_state *uts,
 			    struct blk_desc *dev_desc, int part, int part_type,
@@ -193,4 +193,4 @@
 
 	return 0;
 }
-DM_TEST(dm_test_part_get_info_by_type, UT_TESTF_SCAN_PDATA | UT_TESTF_SCAN_FDT);
+DM_TEST(dm_test_part_get_info_by_type, UTF_SCAN_PDATA | UTF_SCAN_FDT);