gpu: ion: fix ion_platform_data definition

fix ion_platform_heap to make is use an usual way in board configuration file.
Signed-off-by: Benjamin Gaignard <benjamin.gaignard@linaro.org>
[jstultz: modified patch to apply to staging directory]
Signed-off-by: John Stultz <john.stultz@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/android/ion/ion.h

@@ -103,7 +103,7 @@ struct ion_platform_heap {
  */
 struct ion_platform_data {
 	int nr;
-	struct ion_platform_heap heaps[];
+	struct ion_platform_heap *heaps;
 };
 
 /**