staging: android: ion: Add proper header information

The filenames in headers add nothing are often wrong after moves, lets
drop them here and add a little description of the files contents.
Signed-off-by: NAndrew F. Davis <afd@ti.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/android/ion/ion.c

 // SPDX-License-Identifier: GPL-2.0
 /*
- * drivers/staging/android/ion/ion.c
+ * ION Memory Allocator
  *
  * Copyright (C) 2011 Google, Inc.
  */

drivers/staging/android/ion/ion.h

 /* SPDX-License-Identifier: GPL-2.0 */
 /*
- * drivers/staging/android/ion/ion.h
+ * ION Memory Allocator kernel interface header
  *
  * Copyright (C) 2011 Google, Inc.
  */

drivers/staging/android/ion/ion_carveout_heap.c

 // SPDX-License-Identifier: GPL-2.0
 /*
- * drivers/staging/android/ion/ion_carveout_heap.c
+ * ION Memory Allocator carveout heap helper
  *
  * Copyright (C) 2011 Google, Inc.
  */

drivers/staging/android/ion/ion_chunk_heap.c

 // SPDX-License-Identifier: GPL-2.0
 /*
- * drivers/staging/android/ion/ion_chunk_heap.c
+ * ION memory allocator chunk heap helper
  *
  * Copyright (C) 2012 Google, Inc.
  */

drivers/staging/android/ion/ion_cma_heap.c

 // SPDX-License-Identifier: GPL-2.0
 /*
- * drivers/staging/android/ion/ion_cma_heap.c
+ * ION Memory Allocator CMA heap exporter
  *
  * Copyright (C) Linaro 2012
  * Author: <benjamin.gaignard@linaro.org> for ST-Ericsson.

drivers/staging/android/ion/ion_heap.c

 // SPDX-License-Identifier: GPL-2.0
 /*
- * drivers/staging/android/ion/ion_heap.c
+ * ION Memory Allocator generic heap helpers
  *
  * Copyright (C) 2011 Google, Inc.
  */

drivers/staging/android/ion/ion_page_pool.c

 // SPDX-License-Identifier: GPL-2.0
 /*
- * drivers/staging/android/ion/ion_mem_pool.c
+ * ION Memory Allocator page pool helpers
  *
  * Copyright (C) 2011 Google, Inc.
  */

drivers/staging/android/ion/ion_system_heap.c

 // SPDX-License-Identifier: GPL-2.0
 /*
- * drivers/staging/android/ion/ion_system_heap.c
+ * ION Memory Allocator system heap exporter
  *
  * Copyright (C) 2011 Google, Inc.
  */