dtoc: Adjust code for Python 3

Update a few things in this tool so that they support Python 3:
- print statements
- iteritems()
- xrange()

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

tools/dtoc/dtb_platdata.py

@@ -449,7 +449,7 @@ class DtbPlatdata(object):
                 self.out(';\n')
             self.out('};\n')
 
-        for alias, struct_name in self._aliases.iteritems():
+        for alias, struct_name in self._aliases.items():
             if alias not in sorted(structs):
                 self.out('#define %s%s %s%s\n'% (STRUCT_PREFIX, alias,
                                                  STRUCT_PREFIX, struct_name))
@@ -498,7 +498,7 @@ class DtbPlatdata(object):
                         vals.append(get_value(prop.type, val))
 
                     # Put 8 values per line to avoid very long lines.
-                    for i in xrange(0, len(vals), 8):
+                    for i in range(0, len(vals), 8):
                         if i:
                             self.buf(',\n\t\t')
                         self.buf(', '.join(vals[i:i + 8]))

tools/dtoc/dtoc.py

@@ -25,6 +25,8 @@ options. For more information about the use of this options and tool please
 see doc/driver-model/of-plat.txt
 """
 
+from __future__ import print_function
+
 from optparse import OptionParser
 import os
 import sys
@@ -64,11 +66,11 @@ def run_tests(args):
             suite = unittest.TestLoader().loadTestsFromTestCase(module)
         suite.run(result)
 
-    print result
+    print(result)
     for _, err in result.errors:
-        print err
+        print(err)
     for _, err in result.failures:
-        print err
+        print(err)
 
 def RunTestCoverage():
     """Run the tests and check that we get 100% coverage"""

tools/dtoc/test_dtoc.py

@@ -8,6 +8,8 @@ This includes unit tests for some functions and functional tests for the dtoc
 tool.
 """
 
+from __future__ import print_function
+
 import collections
 import os
 import struct
@@ -97,7 +99,7 @@ class TestDtoc(unittest.TestCase):
         if expected != actual:
             self._WritePythonString('/tmp/binman.expected', expected)
             self._WritePythonString('/tmp/binman.actual', actual)
-            print 'Failures written to /tmp/binman.{expected,actual}'
+            print('Failures written to /tmp/binman.{expected,actual}')
         self.assertEquals(expected, actual)
 
     def test_name(self):

tools/dtoc/test_fdt.py

@@ -4,6 +4,8 @@
 # Written by Simon Glass <sjg@chromium.org>
 #
 
+from __future__ import print_function
+
 from optparse import OptionParser
 import glob
 import os
@@ -535,11 +537,11 @@ def RunTests(args):
             suite = unittest.TestLoader().loadTestsFromTestCase(module)
         suite.run(result)
 
-    print result
+    print(result)
     for _, err in result.errors:
-        print err
+        print(err)
     for _, err in result.failures:
-        print err
+        print(err)
 
 if __name__ != '__main__':
     sys.exit(1)