net: Add export.h for EXPORT_SYMBOL/THIS_MODULE to non-modules

These files are non modular, but need to export symbols using
the macros now living in export.h -- call out the include so
that things won't break when we remove the implicit presence
of module.h from everywhere.

Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
diff --git a/net/irda/irttp.c b/net/irda/irttp.c
index 285ccd6..32e3bb0 100644
--- a/net/irda/irttp.c
+++ b/net/irda/irttp.c
@@ -29,6 +29,7 @@
 #include <linux/fs.h>
 #include <linux/seq_file.h>
 #include <linux/slab.h>
+#include <linux/export.h>
 
 #include <asm/byteorder.h>
 #include <asm/unaligned.h>