of: Move of_skipped_node_table within #ifdef CONFIG_OF_ADDRESS

The `struct of_skipped_node_table` is used only when CONFIG_OF_ADDRESS
is defined, move it within the #ifdef/#endif to avoid warnings on
configurations where CONFIG_OF_ADDRESS isn't defined.
Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202308212037.YopffWSU-lkp@intel.com/Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Link: https://lore.kernel.org/r/73dea4f4b389359a8beadbc77b00eb26853f9ab5.1692691032.git.viresh.kumar@linaro.orgSigned-off-by: Rob Herring <robh@kernel.org>

drivers/of/platform.c

@@ -33,11 +33,6 @@ const struct of_device_id of_default_bus_match_table[] = {
 	{} /* Empty terminated list */
 };
 
-static const struct of_device_id of_skipped_node_table[] = {
-	{ .compatible = "operating-points-v2", },
-	{} /* Empty terminated list */
-};
-
 /**
  * of_find_device_by_node - Find the platform_device associated with a node
  * @np: Pointer to device tree node
@@ -89,6 +84,11 @@ void of_device_unregister(struct platform_device *ofdev)
 EXPORT_SYMBOL(of_device_unregister);
 
 #ifdef CONFIG_OF_ADDRESS
+static const struct of_device_id of_skipped_node_table[] = {
+	{ .compatible = "operating-points-v2", },
+	{} /* Empty terminated list */
+};
+
 /*
  * The following routines scan a subtree and registers a device for
  * each applicable node.