microblaze: Do not use module.h in files which are not modules

Based on the patch:
"lib: reduce the use of module.h wherever possible"
(sha1: 8bc3bcc93a2b4e47d5d410146f6546bca6171663)
fix all microblaze files which are not modules.

Signed-off-by: Michal Simek <michal.simek@xilinx.com>
diff --git a/arch/microblaze/kernel/process.c b/arch/microblaze/kernel/process.c
index 282dfb8..246d4c1 100644
--- a/arch/microblaze/kernel/process.c
+++ b/arch/microblaze/kernel/process.c
@@ -8,7 +8,7 @@
  * for more details.
  */
 
-#include <linux/module.h>
+#include <linux/export.h>
 #include <linux/sched.h>
 #include <linux/pm.h>
 #include <linux/tick.h>