irq: fix typo

Impact: build fix

fix build failure on UP.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
diff --git a/kernel/irq/manage.c b/kernel/irq/manage.c
index 948a22a..4358612 100644
--- a/kernel/irq/manage.c
+++ b/kernel/irq/manage.c
@@ -159,7 +159,7 @@
 }
 
 #else
-static inline int do_select_irq_affinity(int irq, struct irq_desc *desc)
+static inline int do_irq_select_affinity(int irq, struct irq_desc *desc)
 {
 	return 0;
 }