openrisc: Switch to use export.h instead of module.h

Reduce dependencies on module.h since all we need here is export.h
for EXPORT_SYMBOL.

Fixes: f50169324d ("module.h: split out the EXPORT_SYMBOL into export.h")
Signed-off-by: Stafford Horne <shorne@gmail.com>

arch/openrisc/kernel/or32_ksyms.c

@@ -15,7 +15,7 @@
  *      2 of the License, or (at your option) any later version.
  */
 
-#include <linux/module.h>
+#include <linux/export.h>
 #include <linux/elfcore.h>
 #include <linux/sched.h>
 #include <linux/in6.h>

arch/openrisc/kernel/process.c

@@ -26,7 +26,7 @@
 #include <linux/sched/task.h>
 #include <linux/sched/task_stack.h>
 #include <linux/kernel.h>
-#include <linux/module.h>
+#include <linux/export.h>
 #include <linux/mm.h>
 #include <linux/stddef.h>
 #include <linux/unistd.h>

arch/openrisc/lib/delay.c

@@ -16,8 +16,9 @@
  */
 
 #include <linux/kernel.h>
-#include <linux/module.h>
+#include <linux/export.h>
 #include <linux/init.h>
+#include <asm/param.h>
 #include <asm/delay.h>
 #include <asm/timex.h>
 #include <asm/processor.h>