blackfin: pm: fix build error

Only register pm ops when defined CONFIG_PM.

Signed-off-by: Steven Miao <realmz6@gmail.com>
Signed-off-by: Bob Liu <lliubbo@gmail.com>
diff --git a/arch/blackfin/mach-common/ints-priority.c b/arch/blackfin/mach-common/ints-priority.c
index 83ff311..6c0c681 100644
--- a/arch/blackfin/mach-common/ints-priority.c
+++ b/arch/blackfin/mach-common/ints-priority.c
@@ -1195,6 +1195,7 @@
 	.suspend = sec_suspend,
 	.resume = sec_resume,
 };
+
 #endif
 #else
 # define bfin_gpio_set_wake NULL
@@ -1596,7 +1597,10 @@
 	bfin_write_SEC_SCI(1, SEC_CCTL, SEC_CCTL_EN | SEC_CCTL_NMI_EN);
 
 	init_software_driven_irq();
+
+#ifdef CONFIG_PM
 	register_syscore_ops(&sec_pm_syscore_ops);
+#endif
 
 	return 0;
 }