binman: Renumber 277_rockchip and 278_mkimage test files

These have ended up with the same numbers as earlier files. Fix them.

Signed-off-by: Simon Glass <sjg@chromium.org>

tools/binman/ftest.py

@@ -6683,18 +6683,18 @@ fdt         fdtmap                Extract the devicetree blob from the fdtmap
 
     def testPackRockchipTpl(self):
         """Test that an image with a Rockchip TPL binary can be created"""
-        data = self._DoReadFile('277_rockchip_tpl.dts')
+        data = self._DoReadFile('291_rockchip_tpl.dts')
         self.assertEqual(ROCKCHIP_TPL_DATA, data[:len(ROCKCHIP_TPL_DATA)])
 
     def testMkimageMissingBlobMultiple(self):
         """Test missing blob with mkimage entry and multiple-data-files"""
         with test_util.capture_sys_output() as (stdout, stderr):
-            self._DoTestFile('278_mkimage_missing_multiple.dts', allow_missing=True)
+            self._DoTestFile('292_mkimage_missing_multiple.dts', allow_missing=True)
         err = stderr.getvalue()
         self.assertIn("is missing external blobs and is non-functional", err)
 
         with self.assertRaises(ValueError) as e:
-            self._DoTestFile('278_mkimage_missing_multiple.dts', allow_missing=False)
+            self._DoTestFile('292_mkimage_missing_multiple.dts', allow_missing=False)
         self.assertIn("not found in input path", str(e.exception))
 
     def _PrepareSignEnv(self, dts='280_fit_sign.dts'):