staging: ralink-gdma: Remove incorrect author information

Lars did not write the ralink-gdma driver. Looks like his name just got
copy&pasted from another similar DMA driver. Remove his name from the
copyright and MODULE_AUTHOR.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Link: https://lore.kernel.org/r/20210607100119.26983-1-lars@metafoo.deSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/ralink-gdma/ralink-gdma.c

 // SPDX-License-Identifier: GPL-2.0+
 /*
- *  Copyright (C) 2013, Lars-Peter Clausen <lars@metafoo.de>
  *  GDMA4740 DMAC support
  */
 
@@ -914,6 +913,5 @@ static struct platform_driver gdma_dma_driver = {
 };
 module_platform_driver(gdma_dma_driver);
 
-MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>");
 MODULE_DESCRIPTION("Ralink/MTK DMA driver");
 MODULE_LICENSE("GPL v2");