mfd: db8500-prcmu: Drop unused MODULE_ tags from non-modular code

The Kconfig currently controlling compilation of this code is:

drivers/mfd/Kconfig:config MFD_DB8500_PRCMU
drivers/mfd/Kconfig:    bool "ST-Ericsson DB8500 Power Reset Control Management Unit"

...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
is already contained at the top of the file in the comments.

We replace module.h with init.h and export.h ; the latter since the
file does export some symbols.
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Lee Jones <lee.jones@linaro.org>

drivers/mfd/db8500-prcmu.c

 /*
+ * DB8500 PRCM Unit driver
+ *
  * Copyright (C) STMicroelectronics 2009
  * Copyright (C) ST-Ericsson SA 2010
  *
@@ -10,7 +12,8 @@
  * U8500 PRCM Unit interface driver
  *
  */
-#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/export.h>
 #include <linux/kernel.h>
 #include <linux/delay.h>
 #include <linux/errno.h>
@@ -3188,9 +3191,4 @@ static int __init db8500_prcmu_init(void)
 {
 	return platform_driver_register(&db8500_prcmu_driver);
 }
-
 core_initcall(db8500_prcmu_init);
-
-MODULE_AUTHOR("Mattias Nilsson <mattias.i.nilsson@stericsson.com>");
-MODULE_DESCRIPTION("DB8500 PRCM Unit driver");
-MODULE_LICENSE("GPL v2");