gpio: mxc: drop unused MODULE_ tags from non-modular code

The Kconfig currently controlling compilation of this code is:

drivers/gpio/Kconfig:config GPIO_MXC
drivers/gpio/Kconfig: def_bool y

...meaning that it currently is not being built as a module by anyone.

Lets remove the couple traces of modular infrastructure use, so that
when reading the driver there is no doubt it is builtin-only.

We delete the MODULE_LICENSE tag etc. since all that information
was (or is now) contained at the top of the file in the comments.
Note the original e-mail had a missing/typo'd @ symbol anyway.

We don't replace module.h with init.h since the file already has that.

Cc: Alexandre Courbot <[e-mail]>
Cc: Daniel Mack <[e-mail]>
Cc: Juergen Beisert <[e-mail]>
Cc: [e-mail]
Signed-off-by: Paul Gortmaker <[e-mail]>
Signed-off-by: Linus Walleij <[e-mail]>

drivers/gpio/gpio-mxc.c

···
  * MXC GPIO support. (c) 2008 Daniel Mack <[e-mail]>
  * Copyright 2008 Juergen Beisert, [e-mail]
  *
- * Based on code from Freescale,
+ * Based on code from Freescale Semiconductor,
+ * Authors: Daniel Mack, Juergen Beisert.
  * Copyright (C) 2004-2010 Freescale Semiconductor, Inc. All Rights Reserved.
  *
  * This program is free software; you can redistribute it and/or
···
 #include <linux/gpio.h>
 #include <linux/of.h>
 #include <linux/of_device.h>
-#include <linux/module.h>
 #include <linux/bug.h>
 
 enum mxc_gpio_hwtype {
···
 	return platform_driver_register(&mxc_gpio_driver);
 }
 postcore_initcall(gpio_mxc_init);
-
-MODULE_AUTHOR("Freescale Semiconductor, "
-	      "Daniel Mack <danielncaiaq.de>, "
-	      "Juergen Beisert <[e-mail]>");
-MODULE_DESCRIPTION("Freescale MXC GPIO");
-MODULE_LICENSE("GPL");