blackfin: bf60x: fix typo "CONFIG_PM_BFIN_WAKE_PA15_POL"

Signed-off-by: Paul Bolle <pebolle@tiscali.nl>
Signed-off-by: Steven Miao <realmz6@gmail.com>
diff --git a/arch/blackfin/mach-bf609/pm.c b/arch/blackfin/mach-bf609/pm.c
index ad505d9..0cdd695 100644
--- a/arch/blackfin/mach-bf609/pm.c
+++ b/arch/blackfin/mach-bf609/pm.c
@@ -210,7 +210,7 @@
 
 #ifdef CONFIG_PM_BFIN_WAKE_PB15
 	wakeup |= PB15WE;
-# if CONFIG_PM_BFIN_WAKE_PA15_POL
+# if CONFIG_PM_BFIN_WAKE_PB15_POL
 	wakeup_pol |= PB15WE;
 # endif
 #endif