base: soc: make it explicitly non-modular

The Kconfig currently controlling compilation of this code is:

drivers/base/Kconfig:config SOC_BUS
drivers/base/Kconfig:   bool

...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 code, the init ordering
remains unchanged with this commit.

Cc: Lee Jones <lee.jones@linaro.org>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: NPaul Gortmaker <paul.gortmaker@windriver.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/base/soc.c

@@ -6,7 +6,6 @@
  */
 
 #include <linux/sysfs.h>
-#include <linux/module.h>
 #include <linux/init.h>
 #include <linux/stat.h>
 #include <linux/slab.h>
@@ -160,11 +159,3 @@ static int __init soc_bus_register(void)
 	return bus_register(&soc_bus_type);
 }
 core_initcall(soc_bus_register);
-
-static void __exit soc_bus_unregister(void)
-{
-	ida_destroy(&soc_ida);
-
-	bus_unregister(&soc_bus_type);
-}
-module_exit(soc_bus_unregister);