clk: microchip: mpfs: update module authorship & licencing

Padmarao wrote the driver in its original, pre upstream form.
Daire & myself have been responsible for getting it upstreamable and
subsequent development.
Move Daire out of the blurb & into a MODULE_AUTHOR entry & add entries
for myself and Padmarao.

While we are at it, convert the MODULE_LICENSE field to its preferred
form of "GPL".
Reviewed-by: Daire McNamara <daire.mcnamara@microchip.com>
Signed-off-by: Conor Dooley <conor.dooley@microchip.com>
Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com>
Link: https://lore.kernel.org/r/20220909123123.2699583-15-conor.dooley@microchip.com

drivers/clk/microchip/clk-mpfs.c

 // SPDX-License-Identifier: GPL-2.0-only
 /*
- * Daire McNamara,<daire.mcnamara@microchip.com>
- * Copyright (C) 2020 Microchip Technology Inc.  All rights reserved.
+ * PolarFire SoC MSS/core complex clock control
+ *
+ * Copyright (C) 2020-2022 Microchip Technology Inc. All rights reserved.
  */
 #include <linux/auxiliary_bus.h>
 #include <linux/clk-provider.h>
@@ -509,4 +510,7 @@ static void __exit clk_mpfs_exit(void)
 module_exit(clk_mpfs_exit);
 
 MODULE_DESCRIPTION("Microchip PolarFire SoC Clock Driver");
-MODULE_LICENSE("GPL v2");
+MODULE_AUTHOR("Padmarao Begari <padmarao.begari@microchip.com>");
+MODULE_AUTHOR("Daire McNamara <daire.mcnamara@microchip.com>");
+MODULE_AUTHOR("Conor Dooley <conor.dooley@microchip.com>");
+MODULE_LICENSE("GPL");