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/div64.c b/lib/div64.c
index 5b49191..3ea2490 100644
--- a/lib/div64.c
+++ b/lib/div64.c
@@ -16,7 +16,8 @@
  * assembly versions such as arch/ppc/lib/div64.S and arch/sh/lib/div64.S.
  */
 
-#include <linux/module.h>
+#include <linux/export.h>
+#include <linux/kernel.h>
 #include <linux/math64.h>
 
 /* Not needed on 64bit architectures */