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/phy.c b/test/dm/phy.c
index d14117f..9b4cff6 100644
--- a/test/dm/phy.c
+++ b/test/dm/phy.c
@@ -68,7 +68,7 @@
 
 	return 0;
 }
-DM_TEST(dm_test_phy_base, UT_TESTF_SCAN_PDATA | UT_TESTF_SCAN_FDT);
+DM_TEST(dm_test_phy_base, UTF_SCAN_PDATA | UTF_SCAN_FDT);
 
 /* Test of the phy uclass using the sandbox phy driver operations */
 static int dm_test_phy_ops(struct unit_test_state *uts)
@@ -140,7 +140,7 @@
 
 	return 0;
 }
-DM_TEST(dm_test_phy_ops, UT_TESTF_SCAN_PDATA | UT_TESTF_SCAN_FDT);
+DM_TEST(dm_test_phy_ops, UTF_SCAN_PDATA | UTF_SCAN_FDT);
 
 static int dm_test_phy_bulk(struct unit_test_state *uts)
 {
@@ -173,7 +173,7 @@
 
 	return 0;
 }
-DM_TEST(dm_test_phy_bulk, UT_TESTF_SCAN_PDATA | UT_TESTF_SCAN_FDT);
+DM_TEST(dm_test_phy_bulk, UTF_SCAN_PDATA | UTF_SCAN_FDT);
 
 static int dm_test_phy_multi_exit(struct unit_test_state *uts)
 {
@@ -232,7 +232,7 @@
 
 	return 0;
 }
-DM_TEST(dm_test_phy_multi_exit, UT_TESTF_SCAN_PDATA | UT_TESTF_SCAN_FDT);
+DM_TEST(dm_test_phy_multi_exit, UTF_SCAN_PDATA | UTF_SCAN_FDT);
 
 static int dm_test_phy_setup(struct unit_test_state *uts)
 {
@@ -261,4 +261,4 @@
 
 	return 0;
 }
-DM_TEST(dm_test_phy_setup, UT_TESTF_SCAN_PDATA | UT_TESTF_SCAN_FDT);
+DM_TEST(dm_test_phy_setup, UTF_SCAN_PDATA | UTF_SCAN_FDT);