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>
diff --git a/lib/scatterlist.c b/lib/scatterlist.c
index 4ceb05d..63a7f2e 100644
--- a/lib/scatterlist.c
+++ b/lib/scatterlist.c
@@ -6,7 +6,7 @@
  * 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/slab.h>
 #include <linux/scatterlist.h>
 #include <linux/highmem.h>