OSS sound core optionalization has __init/__exit mismatches

["Mike Frysinger" <vapier.adi@gmail.com>]

this commit:
commit 1be95f401657e75984871c369d774d507e462939
Author: Tejun Heo <tj@kernel.org>
Date:   Thu Aug 28 16:42:51 2008 +0200
sound: make OSS sound core optional

results in this failure:
WARNING: vmlinux.o(.init.text+0xfbf0): Section mismatch in reference
from the function _init_soundcore() to the function
.exit.text:_cleanup_oss_soundcore()
The function __init _init_soundcore() references
a function __exit _cleanup_oss_soundcore().
This is often seen when error handling in the init function
uses functionality in the exit path.
The fix is often to remove the __exit annotation of
_cleanup_oss_soundcore() so it may be used outside an exit section.

and can easily be seen in sound/sound_core.c:
...
static int __init init_soundcore(void)
{
...
               cleanup_oss_soundcore();
...
}
...
static void __exit cleanup_oss_soundcore(void)
{
...
}
...
-mike