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/nobootmem.c b/mm/nobootmem.c
index 6e93dc7..7fa41b4 100644
--- a/mm/nobootmem.c
+++ b/mm/nobootmem.c
@@ -12,7 +12,7 @@
 #include <linux/pfn.h>
 #include <linux/slab.h>
 #include <linux/bootmem.h>
-#include <linux/module.h>
+#include <linux/export.h>
 #include <linux/kmemleak.h>
 #include <linux/range.h>
 #include <linux/memblock.h>