pinctrl: imx6sl: make it explicitly non-modular

The Kconfig currently controlling compilation of this code is:

drivers/pinctrl/freescale/Kconfig:config PINCTRL_IMX6SL
drivers/pinctrl/freescale/Kconfig:	bool "IMX6SL pinctrl driver"

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

Lets remove the modular code that is essentially orphaned, so that
when reading the driver there is no doubt it is builtin-only.

Since module_init was not in use by this driver, the init ordering
remains unchanged with this commit.

Also note that MODULE_DEVICE_TABLE is a no-op for non-modular code.

We also delete the MODULE_LICENSE tag etc. since all that information
was (or is now) contained at the top of the file in the comments.

Cc: Linus Walleij <linus.walleij@linaro.org>
Cc: Shawn Guo <shawn.guo@linaro.org>
Cc: linux-gpio@vger.kernel.org
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

drivers/pinctrl/freescale/pinctrl-imx6sl.c

 /*
+ * Freescale imx6sl pinctrl driver
+ *
+ * Author: Shawn Guo <shawn.guo@linaro.org>
  * Copyright (C) 2013 Freescale Semiconductor, Inc.
  *
  * This program is free software; you can redistribute it and/or modify
@@ -9,7 +12,6 @@
 #include <linux/err.h>
 #include <linux/init.h>
 #include <linux/io.h>
-#include <linux/module.h>
 #include <linux/of.h>
 #include <linux/of_device.h>
 #include <linux/pinctrl/pinctrl.h>
@@ -371,7 +373,6 @@ static const struct of_device_id imx6sl_pinctrl_of_match[] = {
 	{ .compatible = "fsl,imx6sl-iomuxc", },
 	{ /* sentinel */ }
 };
-MODULE_DEVICE_TABLE(of, imx6sl_pinctrl_of_match);
 
 static int imx6sl_pinctrl_probe(struct platform_device *pdev)
 {
@@ -391,13 +392,3 @@ static int __init imx6sl_pinctrl_init(void)
 	return platform_driver_register(&imx6sl_pinctrl_driver);
 }
 arch_initcall(imx6sl_pinctrl_init);
-
-static void __exit imx6sl_pinctrl_exit(void)
-{
-	platform_driver_unregister(&imx6sl_pinctrl_driver);
-}
-module_exit(imx6sl_pinctrl_exit);
-
-MODULE_AUTHOR("Shawn Guo <shawn.guo@linaro.org>");
-MODULE_DESCRIPTION("Freescale imx6sl pinctrl driver");
-MODULE_LICENSE("GPL v2");