m32r: convert to generic helpers for IPI function calls

This converts m32r to use the new helpers for smp_call_function() and
friends, and adds support for smp_call_function_single(). Not tested,
not even compiled.

Cc: Hirokazu Takata <takata@linux-m32r.org>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
diff --git a/arch/m32r/kernel/traps.c b/arch/m32r/kernel/traps.c
index 89ba4a0..46159a4 100644
--- a/arch/m32r/kernel/traps.c
+++ b/arch/m32r/kernel/traps.c
@@ -40,6 +40,7 @@
 extern void smp_call_function_interrupt(void);
 extern void smp_ipi_timer_interrupt(void);
 extern void smp_flush_cache_all_interrupt(void);
+extern void smp_call_function_single_interrupt(void);
 
 /*
  * for Boot AP function
@@ -103,7 +104,7 @@
 	eit_vector[186] = (unsigned long)smp_call_function_interrupt;
 	eit_vector[187] = (unsigned long)smp_ipi_timer_interrupt;
 	eit_vector[188] = (unsigned long)smp_flush_cache_all_interrupt;
-	eit_vector[189] = 0;
+	eit_vector[189] = (unsigned long)smp_call_function_single_interrupt;
 	eit_vector[190] = 0;
 	eit_vector[191] = 0;
 #endif