SELinux: hashtab.h whitespace, syntax, and other cleanups

This patch changes hashtab.h to fix whitespace and syntax issues.  Things that
are fixed may include (does not not have to include)

spaces used instead of tabs
Signed-off-by: Eric Paris <eparis@redhat.com>
Signed-off-by: James Morris <jmorris@namei.org>

security/selinux/ss/hashtab.h

@@ -49,7 +49,7 @@ struct hashtab *hashtab_create(u32 (*hash_value)(struct hashtab *h, const void *
  * Returns -ENOMEM on memory allocation error,
  * -EEXIST if there is already an entry with the same key,
  * -EINVAL for general errors or
- * 0 otherwise.
+  0 otherwise.
  */
 int hashtab_insert(struct hashtab *h, void *k, void *d);