blackfin: bf60x: add wakeup source select

Support select the wakeup source for power management on bf60x.

Signed-off-by: Steven Miao <realmz6@gmail.com>
Signed-off-by: Bob Liu <lliubbo@gmail.com>
diff --git a/arch/blackfin/mach-common/pm.c b/arch/blackfin/mach-common/pm.c
index c25c2f1..610a3cd 100644
--- a/arch/blackfin/mach-common/pm.c
+++ b/arch/blackfin/mach-common/pm.c
@@ -153,9 +153,6 @@
 
 #ifndef CONFIG_BF60x
 	wakeup = bfin_read_VR_CTL() & ~FREQ;
-#else
-
-#endif
 	wakeup |= SCKELOW;
 
 #ifdef CONFIG_PM_BFIN_WAKE_PH6
@@ -164,6 +161,7 @@
 #ifdef CONFIG_PM_BFIN_WAKE_GP
 	wakeup |= GPWE;
 #endif
+#endif
 
 	ret = blackfin_dma_suspend();