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/int_sqrt.c

diff --git a/lib/int_sqrt.c b/lib/int_sqrt.c
index fd355a9..fc2eeb7 100644
--- a/lib/int_sqrt.c
+++ b/lib/int_sqrt.c
@@ -1,6 +1,6 @@
 
 #include <linux/kernel.h>
-#include <linux/module.h>
+#include <linux/export.h>
 
 /**
  * int_sqrt - rough approximation to sqrt