pinctrl: pinctrl-mt6397 driver explicitly non-modular

The Kconfig for this driver is currently:

config PINCTRL_MT6397
        bool "Mediatek MT6397 pin control" if COMPILE_TEST && !MFD_MT6397

...meaning that it is currently 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 translates to device_initcall in the non-modular
case, the init ordering remains unchanged with this commit.

We also delete the MODULE_LICENSE tag etc. since all that information
is already contained at the top of the file in the comments.

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

Cc: Matthias Brugger <matthias.bgg@gmail.com>
Cc: linux-gpio@vger.kernel.org
Cc: linux-mediatek@lists.infradead.org
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Acked-by: Hongzhou Yang <hongzhou.yang@mediatek.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

drivers/pinctrl/mediatek/pinctrl-mt6397.c

@@ -12,7 +12,7 @@
  * GNU General Public License for more details.
  */
 
-#include <linux/module.h>
+#include <linux/init.h>
 #include <linux/platform_device.h>
 #include <linux/of.h>
 #include <linux/of_device.h>
@@ -55,7 +55,6 @@ static const struct of_device_id mt6397_pctrl_match[] = {
 	{ .compatible = "mediatek,mt6397-pinctrl", },
 	{ }
 };
-MODULE_DEVICE_TABLE(of, mt6397_pctrl_match);
 
 static struct platform_driver mtk_pinctrl_driver = {
 	.probe = mt6397_pinctrl_probe,
@@ -69,9 +68,4 @@ static int __init mtk_pinctrl_init(void)
 {
 	return platform_driver_register(&mtk_pinctrl_driver);
 }
-
-module_init(mtk_pinctrl_init);
-
-MODULE_LICENSE("GPL v2");
-MODULE_DESCRIPTION("MediaTek MT6397 Pinctrl Driver");
-MODULE_AUTHOR("Hongzhou Yang <hongzhou.yang@mediatek.com>");
+device_initcall(mtk_pinctrl_init);