binman: Rename _ReadSubnodes() to ReadEntries()

This method name is more commonly used for this function. Use it
consistently.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/tools/binman/etype/fit.py b/tools/binman/etype/fit.py
index 6936f57..b41187d 100644
--- a/tools/binman/etype/fit.py
+++ b/tools/binman/etype/fit.py
@@ -136,10 +136,10 @@
                                                                   str)])[0]
 
     def ReadNode(self):
-        self._ReadSubnodes()
+        self.ReadEntries()
         super().ReadNode()
 
-    def _ReadSubnodes(self):
+    def ReadEntries(self):
         def _AddNode(base_node, depth, node):
             """Add a node to the FIT
 
diff --git a/tools/binman/etype/intel_ifwi.py b/tools/binman/etype/intel_ifwi.py
index 903d39b..ecbd78d 100644
--- a/tools/binman/etype/intel_ifwi.py
+++ b/tools/binman/etype/intel_ifwi.py
@@ -50,7 +50,7 @@
         self._ifwi_entries = OrderedDict()
 
     def ReadNode(self):
-        self._ReadSubnodes()
+        self.ReadEntries()
         super().ReadNode()
 
     def _BuildIfwi(self):
@@ -117,7 +117,7 @@
         same = orig_data == self.data
         return same
 
-    def _ReadSubnodes(self):
+    def ReadEntries(self):
         """Read the subnodes to find out what should go in this IFWI"""
         for node in self._node.subnodes:
             entry = Entry.Create(self.section, node)
diff --git a/tools/binman/etype/mkimage.py b/tools/binman/etype/mkimage.py
index e499775..c08fd9d 100644
--- a/tools/binman/etype/mkimage.py
+++ b/tools/binman/etype/mkimage.py
@@ -37,7 +37,7 @@
         self._args = fdt_util.GetString(self._node, 'args').split(' ')
         self._mkimage_entries = OrderedDict()
         self.align_default = None
-        self._ReadSubnodes()
+        self.ReadEntries()
 
     def ObtainContents(self):
         data = b''
@@ -55,7 +55,7 @@
         self.SetContents(tools.ReadFile(output_fname))
         return True
 
-    def _ReadSubnodes(self):
+    def ReadEntries(self):
         """Read the subnodes to find out what should go in this image"""
         for node in self._node.subnodes:
             entry = Entry.Create(self, node)