[MIPS] SMTC: Fix module build by exporting symbol

Signed-off-by: NRalf Baechle <ralf@linux-mips.org>

arch/mips/kernel/smtc.c

@@ -4,6 +4,7 @@
 #include <linux/sched.h>
 #include <linux/cpumask.h>
 #include <linux/interrupt.h>
+#include <linux/module.h>
 
 #include <asm/cpu.h>
 #include <asm/processor.h>
@@ -1047,6 +1048,8 @@ void smtc_ipi_replay(void)
 	}
 }
 
+EXPORT_SYMBOL(smtc_ipi_replay);
+
 void smtc_idle_loop_hook(void)
 {
 #ifdef SMTC_IDLE_HOOK_DEBUG