mm: Map most files to use export.h instead of module.h

The files changed within are only using the EXPORT_SYMBOL
macro variants.  They are not using core modular infrastructure
and hence don't need module.h but only the export.h header.

Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
diff --git a/mm/slob.c b/mm/slob.c
index bf39181..8105be4 100644
--- a/mm/slob.c
+++ b/mm/slob.c
@@ -63,7 +63,7 @@
 #include <linux/swap.h> /* struct reclaim_state */
 #include <linux/cache.h>
 #include <linux/init.h>
-#include <linux/module.h>
+#include <linux/export.h>
 #include <linux/rcupdate.h>
 #include <linux/list.h>
 #include <linux/kmemleak.h>