lib: reduce the use of module.h wherever possible

For files only using THIS_MODULE and/or EXPORT_SYMBOL, map
them onto including export.h -- or if the file isn't even
using those, then just delete the include.  Fix up any implicit
include dependencies that were being masked by module.h along
the way.

Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>

lib/bitmap.c

@@ -5,7 +5,8 @@
  * This source code is licensed under the GNU General Public License,
  * Version 2.  See the file COPYING for more details.
  */
-#include <linux/module.h>
+#include <linux/export.h>
+#include <linux/thread_info.h>
 #include <linux/ctype.h>
 #include <linux/errno.h>
 #include <linux/bitmap.h>