treewide: Simply conditions with the new OF_REAL

Use this new Kconfig to simplify the compilation conditions where
appropriate.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/include/clk.h b/include/clk.h
index f3c88fe..f34401f 100644
--- a/include/clk.h
+++ b/include/clk.h
@@ -300,9 +300,7 @@
 	CLK_DEFAULTS_POST_FORCE,
 };
 
-#if (CONFIG_IS_ENABLED(OF_CONTROL) && !CONFIG_IS_ENABLED(OF_PLATDATA)) && \
-	CONFIG_IS_ENABLED(CLK)
-
+#if CONFIG_IS_ENABLED(OF_REAL) && CONFIG_IS_ENABLED(CLK)
 /**
  * clk_set_defaults - Process 'assigned-{clocks/clock-parents/clock-rates}'
  *                    properties to configure clocks