msm8960: Add support to shutdown device.

Add support to shutdown target after configuring PM8921.

Change-Id: I7e2173fc1e46d8f2c6780f1bb0765f8153a2afa9
diff --git a/dev/pmic/pm8921/include/dev/pm8921.h b/dev/pmic/pm8921/include/dev/pm8921.h
index 71f0f37..8b14c02 100644
--- a/dev/pmic/pm8921/include/dev/pm8921.h
+++ b/dev/pmic/pm8921/include/dev/pm8921.h
@@ -98,5 +98,6 @@
 int  pm8921_gpio_config(int gpio, struct pm8921_gpio *param);
 void pm8921_boot_done(void);
 int  pm8921_ldo_set_voltage(uint32_t ldo_id, uint32_t voltage);
+int  pm8921_config_reset_pwr_off(unsigned reset);
 
 #endif